71-80 PROGRAMS

71  Program to display Parameters of HTML

import java.awt.*;

import java.applet.*;

public class ParamDemo extends Applet {

String fontName;

int fontSize;

float leading;

boolean active;

public void start() {

String param;

fontName=getParameter("fontName");

if(fontName==null)

fontName="Not Found";

param=getParameter("fontSize");

try {

if(param != null)

fontSize=Integer.parseInt(param);

else

fontSize=0;

}

catch(NumberFormatException e) {

fontSize=-1;

}

param = getParameter("leading");

try {

if(param != null)

leading = Float.valueOf(param).floatValue();

else

leading=0;

}

catch(NumberFormatException e) {

leading=-1;

}

param=getParameter("accountEnabled");

if(param != null)

active = Boolean.valueOf(param).booleanValue();

}

public void paint(Graphics g) {

g.drawString("Font name: "+fontName,0,10);

g.drawString("Font size: "+fontSize,0,26);

g.drawString("Leading: "+leading,0,42);

g.drawString("Account Active: "+active,0,58);

}

}

72  Program to Demonstrate all shapes in Graphics class

import java.awt.*;

import java.applet.*;

public class FigPaint extends Applet

{

public void paint(Graphics g)

{

g.drawLine(0,0,100,100);

g.drawRect(10,10,60,50);

g.fillRect(100,10,60,50);

g.drawOval(10,10,50,50);

g.fillOval(100,10,75,50);

g.drawArc(10,40,70,70,0,75);

g.fillArc(100,40,70,70,0,75);

}

}

73  Program to Show a Hut,Mountains &  Face

import java.awt.*;

import java.applet.*;

public class house extends Applet

{

public void paint(Graphics g)

{

setBackground(Color.black);

setForeground(Color.white);

g.drawLine(330,220,400,120);

g.drawLine(400,120,470,220);

g.drawLine(349,200,349,300);

g.drawLine(450,200,450,300);

g.drawLine(349,300,450,300);

g.drawRect(385,260,20,40);

g.drawRect(420,220,15,15);

g.fillOval(80,50,40,40);

setBackground(Color.black);

g.drawLine(20,380,60,130);

g.drawLine(60,130,100,360);

g.drawLine(100,360,140,140);

g.drawLine(140,140,180,340);

g.drawLine(180,340,220,150);

g.drawLine(220,150,260,320);

g.drawLine(260,320,315,165);

g.drawLine(315,165,335,210);

g.drawOval(330,350,130,40);

g.drawOval(550,60,60,60);

g.drawOval(565,80,10,10);

g.drawOval(585,80,10,10);

g.drawArc(566,81,30,30,0,-180);

g.drawLine(580,120,580,300);

g.drawLine(520,190,580,160);

g.drawLine(580,160,640,190);

g.drawLine(530,340,580,300);

g.drawLine(580,300,630,340);

}

}

74  Program to Show Status of Applet Window

import java.awt.*;

import java.applet.*;

public class StatusWindow extends Applet {

public void init() {

setBackground(Color.cyan);

}

public void paint(Graphics g)

{

g.drawString("This is in the applet window.",10,20);

showStatus("This is shown in the status window.");

}

}

75  Program to Show Position of  the Mouse in Applet Window

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

public class AppWindow extends Frame {

String keymsg = "";

String mousemsg = "";

int mouseX=30, mouseY=30;

public AppWindow()

{

addKeyListener(new MyKeyAdapter(this));

addMouseListener(new MyMouseAdapter(this));

addWindowListener(new MyWindowAdapter());

}

public void paint(Graphics g)

{

g.drawString(keymsg,10,40);

g.drawString(mousemsg,mouseX,mouseY);

}

public static void main(String args[])

{

AppWindow appwin=new AppWindow();

appwin.setSize(new Dimension(400,200));

appwin.setTitle("an AWT-Based Application");

appwin.setVisible(true);

}

}

class MyKeyAdapter extends KeyAdapter

{

AppWindow appWindow;

public MyKeyAdapter(AppWindow appWindow)

{

this.appWindow=appWindow;

}

public void keyTyped(KeyEvent ke) {

appWindow.keymsg +=ke.getKeyChar();

appWindow.repaint();

};}

class MyMouseAdapter extends MouseAdapter {

AppWindow appWindow;

public MyMouseAdapter(AppWindow appWindow) {

this.appWindow=appWindow;

}

public void mousePressed(MouseEvent me) {

appWindow.mouseX=me.getX();

appWindow.mouseY=me.getY();

appWindow.mousemsg="Mouse Down at "+appWindow.mouseX +", "+appWindow.mouseY;

appWindow.repaint();

}}

class  MyWindowAdapter extends WindowAdapter {

public void windowClosing(WindowEvent we) {

System.exit(0);

}}

76  Program to Demonstrate Colors

import java.awt.*;

import java.applet.*;

public class Colordemo extends Applet{

public void paint(Graphics g){

Color c1 = new Color(255,100,100);

Color c2 = new Color(10,255,100);

Color c3 = new Color(100,200,255);

g.setColor(c1);

g.drawLine(110,50,100,100);

g.drawLine(130,100,100,40);

g.setColor(c2);

g.fillRect(60,120,50,50);

g.setColor(c3);

g.fillOval(20,30,70,70);

g.setColor(Color.black);

g.fillRect(120,50,180,90);

}}

77  Program to Pass Parameters perform Mathematical Operations

import java.awt.*;

import java.applet.*;

public class HelloJavaParam1 extends Applet {

  int a,b;

  public void start() {

     a=Integer.parseInt(getParameter("num1"));    //recieving parameter value

     b=Integer.parseInt(getParameter("num2"));    //recieving parameter value

    }

   public void paint(Graphics g)  {

      g.drawString(" a = "+a +" b =  "+b,20,50);

      g.drawString("Mathematical Operation",20,70);

      g.drawString("Sum  = "+(a+b),20,100);

      g.drawString("Difference =  "+(a-b),20,120);

      g.drawString("Product = "+(a*b),20,140);

      g.drawString("Mod  = "+(a%b),20,160);

     }

}

78  Program To Get Document  Code Bases

import java.awt.*;

import java.applet.*;

import java.net.*;

public class Bases extends Applet{

// Display code and document bases.

public void paint(Graphics g) {

String msg;

URL url = getCodeBase(); // get code base

msg = "Code base: " + url.toString();

g.drawString(msg, 10, 20);

url = getDocumentBase(); // get document base

msg = "Document base: " + url.toString();

g.drawString(msg, 10, 40);

}}

79  Program to Show an Image

import java.awt.*;

import java.applet.*;

public class DrawImageApp extends Applet {

   Image i;

   public void start()

    {

      i = getImage(getDocumentBase(),"sunflower.jpg");

    }

   public void paint(Graphics g)

    {

      g.drawImage(i,50,50,this);

    }

 }

80  Program to Show an Image

import java.awt.*;

import java.applet.*;

public class SimpleBanner extends Applet implements Runnable

 {

String msg = " A Simple Moving Banner.";

Thread t = null;

int state;

boolean stopFlag;

// Set colors and initialize thread.

public void init() {

setBackground(Color.cyan);

setForeground(Color.red);

}

// Start thread

public void start() {

t = new Thread(this);

stopFlag = false;

t.start();

}

// Entry point for the thread that runs the banner.

public void run() {

char ch;

// Display banner

for( ; ; ) {

try {

repaint();

Thread.sleep(250);

ch = msg.charAt(0);

msg = msg.substring(1, msg.length());

msg += ch;

if(stopFlag)

break;

} catch(InterruptedException e) {}

}

}

// Pause the banner.

public void stop() {

stopFlag = true;

t = null;

}

// Display the banner.

public void paint(Graphics g) {

g.drawString(msg, 50, 30);

}

}