JNTU JAVA Lab Manual Programs

RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

IInd CSE

IV YEAR B.Tech

JAVA PROGRAMMING MANUAL OOP’s Through Java

Prepared By R.Venkata Subbaiah Associate Professor IC RNEC@Development Cell

Department of CSE RAO & NAIDU ENGINEERING COLLEGE For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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ONGOLE

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:1-A AIM:write a java program to print all real solutions to the qudratic eq ax2+b+c=0 Read a,b,c values and use the formula (–b+sqrt(b2-4ac))/2a. SOURCE CODE: //importing io class import java.io.*; //importing Math class import java.lang.Math; class qd_eq { public static void main(String[] args) throws IOException { String s; int a,b,c,d; double r1,r2; DataInputStream in=new DataInputStream(System.in); System.out.print("Enter a value?"); s=in.readLine(); a=Integer.parseInt(s); System.out.print("Enter b value?"); s=in.readLine(); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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b=Integer.parseInt(s); System.out.print("Enter c value?"); s=in.readLine(); c=Integer.parseInt(s); d=((b*b)-(4*a*c)); if(djavac qd_eq.java INTERPRETATION: D:\cse>java qd_eq

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:1-B AIM: write a java program to print a fibonacci series 1,1,2,3…………….. upto the scanned or need value File Name: fib.java Source code: //importing io classes import java.io.*; class Fibonacci { public static void main(String[] args) throws IOException { DataInputStream in=new DataInputStream(System.in); String s; int a=1,b=1,c=a+b; int n; System.out.print("Enter nth value?"); s=in.readLine(); n=Integer.parseInt(s); System.out.print(a+","+b); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming while(cjavac fibonacci.java Interpretation: D:/cse>java fibanocci

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:2-A AIM : write a java program to accept a number and print all the numbers. FileName: prime.java Source code: //import io package import java.io.*; class prime { public static void main(String[] args) throws IOException { String s; int no,i,j; DataInputStream in=new DataInputStream(System.in); System.out.print("Enter a value?"); s=in.readLine(); no=Integer.parseInt(s); for(i=no;i>=1;i--) For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming {

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for(j=2;jjavac prime.java Interpretation: D\:cse>java prime

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

Rollno:09771A0524

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WEEK:2-B

AIM: write a java program to display multiplication of two 3*3 matrices. File name: matmul.java Source code: //import io package import java.io.*; class matmul { public static void main(String[] args) throws IOException { int mat1[][]={{1,2,3},{4,5,6},{7,8,9}}; int mat2[][]={{1,2,3},{4,5,6},{7,8,9}}; int mat3[][],i,j,k; mat3=new int[3][3]; for(i=0;ijava pal

Rollno:09771A0524 For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

WEEK:3-B 21

RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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AIM: write a java program for sorting given list of names in ascending or descending. FileName: strsort.java Source code:

\\importing io class\\ import java.io.*; class strsort { public static void main(String arg[]) throws IOException {

int i,j,len; String s[]=new String[5],swp; DataInputStream in=new DataInputStream(System.in); System.out.println("Enter 5 strings ?"); for(i=0;ijavac wordcount.java Interpretation: D\:cse>java wordcount

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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WEEK:4-A

AIM:Program to read a file and check whether the file exists,readable,writable and also print the length. File Name: filetest.java So urce code: //import io package// import java.io.*; class filetest { public static void main(String args[]) throws IOException { String fname; DataInputStream in=new DataInputStream(System.in);

System.out.print("Enter a file name?"); fname=in.readLine(); //opening file File f=new File(fname);

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming if(f.exists())

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System.out.println("File exists.."); else System.out.println("File not exists..");

if(f.canRead()) System.out.println("File is readable.."); else System.out.println("File is not readable..");

if(f.canWrite()) System.out.println("File is writable.."); else System.out.println("File is not Writable.."); System.out.println("File length :"+f.length()); } }

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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OUTPUT: Compilation: D:csejava>javac filetest.java Interpretataion: D:\csejava>java filetest

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

Rollno:09771A0524

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WEEK:4-B

AIM:Program to read a file and print the file with line numbers. FileName: fileread.java Source code: //import io package// import java.io.*; class fileread {

public static void main(String args[]) throws IOException { int ch,ctr=1; String fname; DataInputStream in=new DataInputStream(System.in);

System.out.print("Enter a file name?"); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming fname=in.readLine();

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//opening file FileInputStream f=new FileInputStream(fname);

System.out.print(ctr+" ");

while((ch=f.read())!=-1) { System.out.print((char)ch);

if(ch=='\n') { ctr++; System.out.print(ctr+" "); } } } }

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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OUTPUT: Compilation: D:\csejava>javac fileread.java Interpretation: D:\csejava>java fileread

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

Rollno:09771A0524

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WEEK:4-C

AIM:Program to read a file and print char count,word count,line count. File name: edit filestat.java sourcecode: For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming //import io package//

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import java.io.*; class filestat { public static void main(String args[]) throws IOException { int pre=' ' , ch , ctr=0 , L=0 , w=1; String fname; DataInputStream in=new DataInputStream(System.in); System.out.print("Enter a file name?"); fname=in.readLine(); //opening file FileInputStream f=new FileInputStream(fname); while((ch=f.read())!=-1) { //char count if(ch!=' ' && ch!='\n') ctr++; //line count if(ch=='\n') L++; //word count For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming if(ch==' ' && pre!=' ')

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w++; pre=ch; } System.out.println("Char count="+ctr); System.out.println("Word count="+(w+(L-1))); System.out.println("Line count="+L); } }

OUTPUT: Compilation: D:\csejava>javac filestat.java Interpretation: For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming D:\csejava>java filestat

Rollno:09771A0524

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WEEK:5-A

AIM: write a java program to implement stack using adt. File name: For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming Edit stackadt.java

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Source code: //import io package// import java.io.*; //stack capable to store 4 elements class Stack { int max,top; int no[]; public Stack() { no=new int[5]; top=-1; max=5; } public void push(int n) { if(topjava stackadt

Week:5-B For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming IInd CSE AIM: write a java program to convert infix expression to postfix expression forms. File name: Edit intopost.java Source code: //import io package// import java.io.*; class intopost { int top,j,i; String str; char t,postfix[],s[]; public intopost() { top=-1;i=0;j=0; postfix=new char[30]; s=new char[30]; } public void push(char t) top++; s[top]=t; } public char pop() For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming {

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char t; t=s[top]; top--; return t; } public void check() { while(priority(t)java intopost

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:5-C AIM: write a java program to evaluate a postfix expression. File name: Edit pfexevl.java Source code: //import io package// import java.io.*; /import lang package// import java.lang.Math; class pfixevl { int top,j,i; String str; char t,postfix[]; int s[]; DataInputStream in; public pfixevl() { For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming top=-1;i=0;

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postfix=new char[30]; s=new int[30]; in=new DataInputStream(System.in); } public void push(int val) { top++; s[top]=val; } public int pop() { int val; val=s[top]; top--; return val; } public void evaluate(String str) throws IOException { int op1,op2,value=0; while(i='a' && t='A' && tjavac pfexevl.java Interpretation: D:/cse>java pfexevl

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:6-A Aim: write a java program to develop an applet that display simple message. File name: For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming Applt.java

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Source code: import java.awt.*; import java.applet.*; public class applt extends Applet { public void init() { resize(250,250); }

public void paint(Graphics g) { Font myfont=new Font("Times new roman",Font.BOLD + Font.ITALIC,25); g.setFont(myfont); g.drawRect(100,100,300,450); g.setColor(Color.orange); g.fillRect(100,100,30,50); g.setColor(Color.red); g.drawString("hello world",120,120); g.drawRect(100,100,300,450); g.setColor(Color.green); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming g.fillRect(150,150,30,50);

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} }

/* */

Output: Compilation: D:\cse>javac applt.java For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming Interpretation:

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D:\cse>appletviewer applt.java

Week:6-B

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming IInd CSE AIM:Develop an Applet that receives an integer in one text field and computes its factorial value and returans it in another text field,when the button named compute is clicked. File name: edit appltfact.java Source code: \\import java packages\\ import java.applet.*; import java.awt.*; import java.awt.event.*;

class actlstn implements ActionListener { public void actionPerformed(ActionEvent e) { int ctr=1,no=0,fact=1; Button bt; bt=(Button)e.getSource(); if((bt.getLabel()).equals("compute")) { no=Integer.parseInt(appltfact.t1.getText()); while(ctrjavac appltfact.java Interpretation: D:\cse java>appletviewer appltfact.java

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Week:7 AIM:Write a java program that works as a simple calculator use a grid layput to arrange for the digits and for +,-,*,/,% operations.Adda text field to display the resut. File name: Edit appltcal.java Source code: \\importing java packages\\ import java.applet.*; import java.awt.*; import java.awt.event.*;

//event listener interface for event handling

class actlstn implements ActionListener { public void actionPerformed(ActionEvent e) {

int no=0,val,prev; String txt; Button bt; For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming bt=(Button)e.getSource();

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txt=bt.getLabel();

if(txt.equals("C")) { appltcal.t.setText(""); } else { if(txt.equals("+")) { if(appltcal.sta==0) { appltcal.pval=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(""); appltcal.sta=1; } else {

no=appltcal.pval; no+=Integer.parseInt(appltcal.t.getText()); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming appltcal.t.setText(String.valueOf(no));

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appltcal.sta=0; } } if(txt.equals("-")) { if(appltcal.sta==0) { appltcal.pval=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(""); appltcal.sta=1; } else { no=appltcal.pval; no-=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(String.valueOf(no)); appltcal.sta=0; } } if(txt.equals("*")) { For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming if(appltcal.sta==0)

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{ appltcal.pval=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(""); appltcal.sta=1; } else { no=appltcal.pval; no*=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(String.valueOf(no)); appltcal.sta=0; }

}

if(txt.equals("/")) For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming {

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if(appltcal.sta==0) { appltcal.pval=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(""); appltcal.sta=1; } else { no=appltcal.pval; no/=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(String.valueOf(no)); appltcal.sta=0; } } if(txt.equals("%")) { if(appltcal.sta==0) { appltcal.pval=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(""); appltcal.sta=1; For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming }

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else { no=appltcal.pval; no%=Integer.parseInt(appltcal.t.getText()); appltcal.t.setText(String.valueOf(no)); appltcal.sta=0; } } } } } public class appltcal extends Applet { static int sta,pval; static TextField t; Button a,m,d,s,r,b;

Panel p; public void init() For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming {

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t=new TextField("000000"); a=new Button("+"); s=new Button("-"); d=new Button("/"); m=new Button("*"); r=new Button("%"); b=new Button("C"); //adding listener actlstn lstn=new actlstn(); a.addActionListener(lstn); s.addActionListener(lstn); d.addActionListener(lstn); m.addActionListener(lstn); r.addActionListener(lstn); b.addActionListener(lstn); //setting panel and layout p=new Panel(); p.setLayout(new GridLayout(3,2)); p.add(t); p.add(a); p.add(s); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming p.add(d);

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p.add(m); p.add(r); p.add(b); //adding pane add(p); setSize(300,400); setVisible(true); } public void paint(Graphics g) { showStatus("Calculator..."); }

}

//applet code //

/* For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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*/

OUTPUT: Compilation: D:\csejava>javac appltcal.java Interpretation: D:\csejava>appletviewer appltcal.java

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:1-A AIM:Write a java program for handling mouse events [whenever user moves the mouse it had to display the xy coordinates on the canvas(graphics] File name: For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming edit appltmouse.java

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Source code: import java.applet.; import java.awt.Graphics; import java.awt.TextField; import java.awt.event.MouseMotionListener; import java.awt.event.MouseEvent; import java.awt.Panel; public class appltmouse1 extends Applet implements MouseMotionListener { static TextField t; int x,y; public void mouseDragged(MouseEvent m) { } public void mouseMoved(MouseEvent m) { x=m.getX(); y=m.getY(); appltmouse.t.setText(String.valueOf(x)+" , "+String.valueOf(y)); repaint(); For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming }

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public void init() { t=new TextField("........"); Panel p=new Panel(); p.add(t); add(p); //mouse event deligation addMouseMotionListener(this); setSize(300,400); setVisible(true); } public void paint(Graphics g) { g.drawRect(20,20,100,200); g.drawString(t.getText(),x,y); } }

//applet code/// /* For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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*/

OUTPUT: Compilation: For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming D:\csejava>javac appltmouse.java

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Interpretation: D:\csejava>appletviewer appltmouse.java

Week:1-A For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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AIM:Write a java program that create 3 threads that the 1st thread to display GOOD MORNING for every 1second,2nd thread to display HELLO for every 2seconds and the 3rd thread to display WELCOME for every 3 seconds. File name:edit multhread.java Source code: import java.io.*; import java.lang.*;

class threada extends Thread { public void run() { for(; ;) { try { System.out.println("GOOD MORNING"); sleep(1000); } catch(Exception e) { For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming System.out.println(e.toString());

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} } } }

class threadb extends Thread { public void run() { for(; ;) { try { System.out.println("HELLO"); sleep(2000); } catch(Exception e)

{ System.out.println(e.toString()); } For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming }

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} } class threadc extends Thread { public void run() { for(; ;) { try { System.out.println("WELCOME"); sleep(3000); } catch(Exception e) { System.out.println(e.toString()); } } } }

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming class multhreadss

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{ public static void main(String arg[]) { //creating new thread threada t1=new threada(); threadb t2=new threadb(); threadc t3=new threadc();

//staring threads t1.start(); t2.start(); t3.start(); } }

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Output: Compilation: D:/csejava>javac multhreadss.java Interpretation: D:\csejava>java multhreadss

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming

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Week:1-A AIM: write a java program that implements producer,consumer problem using the concept of inter threacommunication. File name: Edit producerconsumer.java Source code: \\import io package\\ import java.io.*; class Consumer extends Thread { private CubbyHole cubbyhole; private int number; public Consumer(CubbyHole c,int number) { cubbyhole=c; this.number=number;

} public void run() For More solutions : Ravinuthalavs.webs.com Ravinuthalavs.blogspot.com

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RAO&NAIDU ENGINEERING COLLEGE LAB: Object Oriented Programming {

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int value=0; for(int i=0;i