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1 Vinayaka Missions University VMKV Engineering College Salem Department of Computer Science & Software Engineering [CSSE] LAB MANUAL JAVA PROGRAMMING (V Semester) Prepared by A.RAMESH KUMAR

2 List of Lab Exercises Sl. No. Exercise 1 Largest Number Finding of N Values Page No. 2 Sorting of Name (String) 3 String Manipulation 4 Overloading & Constructor Implementation 5 Bank Operation using Class & Object 6 User Defined Package Creation 7 Multiple Inheritance using Interface 8 Simple AWT to Design Simple Calculator 9 Biodata Generation using Frame 10 Drawing 2D Shapes using Menubar Java Programming Lab Manual CSSE /VMKVEC. 2

3 JAVA PROGRAMMING Java Programming Lab Manual CSSE /VMKVEC. 1

4 Ex. No: 1 Date : Largest Number Finding of N Values AIM ALGORITHM: PROGRAM: import java.io.*; public class biggest public static void main(string srgs[])throws Exception int i[]=new int[100]; DataInputStream d=new DataInputStream(System.in); System.out.print("Enter howmany values : "); int n=integer.parseint(d.readline()); for(int j=0;j<n;j++) System.out.print("Enter the value "+(j+1)+" :"); i[j]=integer.parseint(d.readline()); int big=0; for(int j=0;j<n;j++) if(i[j]>big) big=i[j]; System.out.println("The biggest number is : "+big); Java Programming Lab Manual CSSE /VMKVEC. 2

5 OUTPUT: D:\Programs\java\VMKV\LAB>JAVAC biggest.java D:\Programs\java\VMKV\LAB>JAVA biggest Enter how many values : 5 Enter the value 1 :7 Enter the value 2 :2 Enter the value 3 :5 Enter the value 4 :8 Enter the value 5 :1 The biggest number is : 8 Java Programming Lab Manual CSSE /VMKVEC. 3

6 Ex. No: 2 Date : Sorting of Name (String) AIM ALGORITHM: PROGRAM: import java.io.*; public class sorting public static void main(string args[])throws Exception DataInputStream d=new DataInputStream(System.in); String s[]=new String[100]; System.out.print("Enter how many names : "); int n=integer.parseint(d.readline()); for(int j=0;j<n;j++) System.out.print("Enter Name "+(j+1) + ":" ); s[j]=d.readline(); String name; for(int j=0;j<n;j++) for(int k=j+1;k<n;k++) if(s[j].compareto(s[k])>0) name=s[j]; s[j]=s[k]; s[k]=name; System.out.println("SORTED NAME LIST:"); for(int j=0;j<n;j++) System.out.println(s[j]); Java Programming Lab Manual CSSE /VMKVEC. 4

7 OUTPUT: D:\Programs\java\VMKV\LAB>JAVAC sorting.java D:\Programs\java\VMKV\LAB>JAVA sorting Enter how many names : 5 Enter Name 1:Zenith Enter Name 2:Wipro Enter Name 3:HP Enter Name 4:Alpha Enter Name 5:Infosys SORTED NAME LIST: Aalpha HP Infosys Wipro Zenith Java Programming Lab Manual CSSE /VMKVEC. 5

8 Ex. No: 3 Date : String Manipulation AIM ALGORITHM: PROGRAM: import java.io.*; public class string public static void main(string args[])throws Exception DataInputStream d=new DataInputStream(System.in); System.out.print("Enter String 1 :"); String s1=d.readline(); System.out.print("Enter String 2 :"); String s2=d.readline(); System.out.println("FEW STRING MANIPULATION"); System.out.println("String Concatenation : "+s1.concat(s2)); System.out.println("Length of String 2 : "+s2.length()); System.out.println("Compare two Strings : "+s1.equalsignorecase("cse")); System.out.println("Spliting the String into substring : "+s2.substring(6)); System.out.println("Convert to Lowercase : "+s1.tolowercase()); System.out.println("Convert to Uppercase : "+s2.touppercase()); OUTPUT: D:\Programs\java\VMKV\LAB>JAVAC string.java D:\Programs\java\VMKV\LAB>JAVA string Enter String 1 :CSSE Enter String 2 :Department FEW STRING MANIPULATION String Concatenation : CSSEDepartment Length of String 2 : 10 Compare two Strings : false Spliting the String into substring : ment Convert to Lowercase : csse Convert to Uppercase : DEPARTMENT Java Programming Lab Manual CSSE /VMKVEC. 6

9 Ex. No: 4 Date : Overloading & Constructor Implementation AIM ALGORITHM: PROGRAM: import java.io.*; class over int a,b; over(string s) a=50; b=30; System.out.println("Welcome : "+s); over() a=5; b=10; System.out.print("Enter your Name : "); void add() System.out.println("RESULT:\nA Value : "+a+"\nb Value : "+b+"\ntotal :"+(a+b)); void add(int x,int y,int z) System.out.println("RESULT:\nA Value : "+x+"\nb Value : "+y+"\nc Value : "+z+"\ntotal :"+(x+y+z)); public class over4 public static void main(string arg[])throws Exception DataInputStream d=new DataInputStream(System.in); over o=new over(); String st=d.readline(); over o1=new over(st); o.add(); o1.add(); Java Programming Lab Manual CSSE /VMKVEC. 7

10 System.out.println("Enter 3 Numbers"); int a=integer.parseint(d.readline()); int b=integer.parseint(d.readline()); int c=integer.parseint(d.readline()); o.add(a,b,c); OUTPUT: D:\Programs\java\VMKV\LAB>javac over4.java D:\Programs\java\VMKV\LAB>java over4 Enter your Name : CSSE Department Welcome : CSSE Department RESULT: A Value : 5 B Value : 10 Total :15 RESULT: A Value : 50 B Value : 30 Total :80 Enter 3 Numbers RESULT: A Value : 12 B Value : 30 C Value : 41 Total :83 Java Programming Lab Manual CSSE /VMKVEC. 8

11 Ex. No: 5 Date : Bank Operation using Class & Object AIM ALGORITHM: PROGRAM: import java.util.*; import java.io.*; public class bank String name, actype; int accno, bal, amt; bank(string name, int accno, String actype, int bal) this.name = name; this.accno = accno; this.actype = actype; this.bal = bal; int deposit(int amt) if (amt < 0) System.out.println("Invalid Amount"); return 1; bal = bal + amt; return 0; int withdraw(int amt) if (bal < amt) System.out.println("Not sufficient balance."); return 1; if (amt < 0) System.out.println("Invalid Amount"); return 1; bal = bal - amt; return 0; void display() Java Programming Lab Manual CSSE /VMKVEC. 9

12 System.out.println("Name:" + name); System.out.println("Account No:" + accno); System.out.println("Balance:" + bal); public static void main(string args[]) throws Exception DataInputStream d=new DataInputStream(System.in); System.out.print("Enter your Name : "); String nn = d.readline(); System.out.print("Enter Account Number : "); int num = Integer.parseInt(d.readLine()); System.out.print("Enter Account Type: "); String type = d.readline(); System.out.print("Enter Initial Balance: "); int bal = Integer.parseInt(d.readLine()); bank b1 = new bank(nn, num, type, bal); int menu; boolean quit = false; do System.out.println(" Menu"); System.out.println("1. Deposit Amount"); System.out.println("2. Withdraw Amount"); System.out.println("3. Display Information"); System.out.println("4. Exit"); System.out.print("Please enter your choice: "); menu = Integer.parseInt(d.readLine()); switch (menu) case 1: System.out.print("Enter amount to deposit:"); int am = Integer.parseInt(d.readLine()); b1.deposit(am); break; case 2: System.out.println("Your Balance=" + b1.bal); System.out.print("Enter amount to withdraw:"); am =Integer.parseInt(d.readLine()); b1.withdraw(am); break; case 3: b1.display(); break; case 4: quit = true; break; while (!quit); Java Programming Lab Manual CSSE /VMKVEC. 10

13 OUTPUT: D:\Programs\java\VMKV\LAB>javac bank.java D:\Programs\java\VMKV\LAB>java bank Enter your Name : RAJESH Enter Account Number : 3339 Enter Account Type: SAVINGS Enter Initial Balance: Menu 1. Deposit Amount 2. Withdraw Amount 3. Display Information 4. Exit Please enter your choice: 1 Enter amount to deposit:500 Menu 1. Deposit Amount 2. Withdraw Amount 3. Display Information 4. Exit Please enter your choice: 3 Name:RAJESH Account No:3339 Balance:10500 Menu 1. Deposit Amount 2. Withdraw Amount 3. Display Information 4. Exit Please enter your choice: 2 Your Balance=10500 Enter amount to withdraw:2500 Menu 1. Deposit Amount 2. Withdraw Amount 3. Display Information 4. Exit Please enter your choice: 3 Name:RAJESH Account No:3339 Balance:8000 Menu 1. Deposit Amount 2. Withdraw Amount 3. Display Information 4. Exit Please enter your choice: 4 Java Programming Lab Manual CSSE /VMKVEC. 11

14 Ex. No: 6 Date : User Defined Package Creation AIM ALGORITHM: PROGRAM: // Mypack Program package mypack; public class mypack public void disp() System.out.println("My First Package"); // import mypack.*; public class pack public static void main(string[] args) mypack d=new mypack(); d.disp(); OUTPUT: D:\Programs\java\VMKV>javac pack.java D:\Programs\java\VMKV>java pack My First Package Java Programming Lab Manual CSSE /VMKVEC. 12

15 Ex. No: 7 Date : Multiple Inheritance using Interface AIM ALGORITHM: PROGRAM: OUTPUT: Java Programming Lab Manual CSSE /VMKVEC. 13

16 Ex. No: 8 Date : Simple AWT to Design Simple Calculator AIM ALGORITHM: import java.applet.*; import java.awt.*; import java.awt.event.*; import java.awt.choice.*; //<applet code=calc width=500 height=555></applet> public class calc extends Applet implements TextListener,ActionListener int a,b,c; String s; TextField f1,f2,f3; Label l1,l2,l3; Button Add,Sub,Mul,Div; public void init() //setbackground(color.green); setforeground(color.red); l1=new Label("First number"); l2=new Label("Second number"); l3=new Label("Result"); f1=new TextField(10); f2=new TextField(20); f3=new TextField(20); //f3=new TextField(20); //f2.setechochar("*"); add(l1); add(f1); add(l2); add(f2); add(l3); add(f3); Add=new Button("Add"); Sub=new Button("Sub"); Mul=new Button("Mult"); Div=new Button("Div"); add(add); add(sub); add(mul); add(div); f1.addtextlistener(this); f2.addtextlistener(this); f3.addtextlistener(this); Java Programming Lab Manual CSSE /VMKVEC. 14

Add.addActionListener(this); Sub.addActionListener(this); Mul.addActionListener(this); Div.addActionListener(this); public void actionperformed(actionevent ae) a=integer.parseint(f1.

17 Add.addActionListener(this); Sub.addActionListener(this); Mul.addActionListener(this); Div.addActionListener(this); public void actionperformed(actionevent ae) a=integer.parseint(f1.gettext()); b=integer.parseint(f2.gettext()); if(ae.getactioncommand().equals("add")) c=a+b; else if(ae.getactioncommand().equals("sub")) c=a-b; else if(ae.getactioncommand().equals("mult")) c=a*b; else c=a/b; s=string.valueof(c); repaint(); public void paint(graphics g) f3.settext(s); //g.drawstring(string.valueof(c),355,355); PROGRAM: OUTPUT: Java Programming Lab Manual CSSE /VMKVEC. 15

18 Ex. No: 9 Date : Bio-data Generation using Frame AIM ALGORITHM: PROGRAM: import java.awt.*; import java.awt.event.*; public class biodata extends Frame public static void main(string[] args) Frame f = new Frame("Biodata - Entry"); f.setlayout(null); Label l1 = new Label("Biodata"); Label l2 = new Label("Name"); Label l3 = new Label("Gender"); Label l4 = new Label("Address"); Label l5 = new Label("Country"); Label l6 = new Label("Languages Known"); Label l7 = new Label("Hobies"); Checkbox cb1 = new Checkbox("Watch TV",false); Checkbox cb2 = new Checkbox("Play Cricket",false); Button b=new Button("Submit") ; CheckboxGroup rb = new CheckboxGroup(); Checkbox rb1=new Checkbox("Male",rb,false); Checkbox rb2=new Checkbox("Female",rb,false); TextArea ta= new TextArea(); TextField t=new TextField(15); Choice ch=new Choice(); ch.additem("india"); ch.additem("china"); ch.additem("america"); ch.additem("rusia"); ch.additem("japan"); ch.additem("uk"); Java Programming Lab Manual CSSE /VMKVEC. 16

19 List l = new List(5, true); l.additem("hindi"); l.additem("tamil"); l.additem("english"); l.additem("french"); l.additem("chinese"); l.additem("telegu"); l.additem("malayalam"); l.additem("kanada"); t.seteditable(true); l2.setbounds(60, 50, 100, 30); l3.setbounds(60, 80, 100, 30); l4.setbounds(60,110, 100, 30); l5.setbounds(60,190, 100, 30); l6.setbounds(60, 220, 150, 30); l7.setbounds(60, 300, 150, 30); cb1.setbounds(250,300, 70, 25); cb2.setbounds(350, 300, 180, 25); rb1.setbounds(250, 80, 80, 25); rb2.setbounds(350, 80, 80, 25); b.setbounds(100, 450, 200, 25); ch.setbounds(250, 190, 100, 25); l.setbounds(250, 220, 100, 50); t.setbounds(250, 50, 200, 25); ta.setbounds(250, 120, 200, 60); f.add(l1); f.add(l2); f.add(l3); f.add(l4); f.add(l5); f.add(l6); f.add(l7); f.add(b); f.add(cb1); f.add(cb2); f.add(rb1); f.add(rb2); f.add(ta); f.add(t); f.add(ch); Java Programming Lab Manual CSSE /VMKVEC. 17

20 f.add(l); f.setsize(600,700); f.setvisible(true); f.setlocation(200,0); b.addactionlistener(new ActionListener() public void actionperformed(actionevent e) //Execute when button is pressed System.out.println("You Record Saved"); ); System.exit(0); OUTPUT: Java Programming Lab Manual CSSE /VMKVEC. 18

21 Ex. No: 10 Date : AIM Drawing 2D Shapes using Menu bar ALGORITHM: PROGRAM: import java.awt.*; import java.awt.event.*; public class menushape extends Frame public menushape() super("2d Shapes - Menus"); setsize(400, 600); FileMenu filemenu = new FileMenu(this); MenuBar mb = new MenuBar(); mb.add(filemenu); setmenubar(mb); addwindowlistener(new WindowAdapter() public void windowclosing(windowevent e) exit(); ); public void exit() setvisible(false); dispose(); System.exit(0); public void rec() Graphics g=getgraphics(); g.drawrect(250,50,100,50); Java Programming Lab Manual CSSE /VMKVEC. 19

22 public void cir() Graphics g=getgraphics(); g.drawoval(250,250,100,100); public void lin() Graphics g=getgraphics(); g.drawline(50,250,200,250); public static void main(string args[]) menushape w = new menushape(); w.setvisible(true); class FileMenu extends Menu implements ActionListener menushape mw; public FileMenu(menushape m) super("shape"); mw = m; MenuItem mi; add(mi = new MenuItem("Circle")); mi.addactionlistener(this); add(mi = new MenuItem("Rectangle")); mi.addactionlistener(this); add(mi = new MenuItem("Line")); mi.addactionlistener(this); add(mi = new MenuItem("Exit")); mi.addactionlistener(this); public void actionperformed(actionevent e) String item = e.getactioncommand(); if (item.equals("exit")) mw.exit(); else if (item.equals("circle")) mw.cir(); Java Programming Lab Manual CSSE /VMKVEC. 20

23 else if (item.equals("rectangle")) mw.rec(); else if (item.equals("line")) mw.lin(); OUTPUT Java Programming Lab Manual CSSE /VMKVEC. 21

1 GUI GUI GUI GUI GUI. GUI(Graphical User Interface) JDK java.awt. ? Component

1 GUI GUI GUI GUI GUI. GUI(Graphical User Interface) JDK java.awt. ? Component 99 6 1999.10.13 0 GUI GUI JDK 1.1 GUI 1 GUI GUI GUI(Graphical User Interface) GUI (GUI ) / ( GUI ) Java GUI JDK 1.1 1.2 1.2 Swing 1.1 java.awt GUI? Component setbounds(int, int, int, int) (x,y) setforeground(color)