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Saturday, January 14, 2012
6 Exceptions
7a Multiple Threading
//MULTITHREAD
class mul1 implements Runnable
{
public void run()
{
try
{
for(int i=1;i<=10;i++)
{
System.out.println(i+"x2="+(i*2));
Thread.sleep(800);
}
}
catch(Exception e)
{ }
}
}
class multible
{
public static void main(String args[])
{
mul1 ob=new mul1();
Thread t1=new Thread(ob);
Thread t2=new Thread(ob);
Thread t3=new Thread(ob);
t1.start();
t2.start();
t3.start();
}
}
7b Inter-Thread Communication
Will come Soon ;)
5b Text Field and Label Applet
Will come Soon ;)
4c Stack Class
import java.util.*;
public class StackDemo
{
public static void main(String[] args)
{
Stack stack=new Stack();
stack.push(new Integer(10));
stack.push("a");
System.out.println("The contents of Stack is" + stack);
System.out.println("The size of an Stack is" + stack.size());
System.out.println("The number poped out is" + stack.pop());
System.out.println("The number poped out is " + stack.pop());
System.out.println("The contents of stack is" + stack);
System.out.println("The size of an stack is" + stack.size());
}
}
5a Applet Program
import java.applet.*;
import java.awt.*;
public class SampleApplet extends Applet
{
public void init()
{
setBackground(Color.blue);
setForeground(Color.red);
}
public void paint(Graphics g)
{
g.drawString("Welcome to java",20,20);
}
}
//<applet code="SampleApplet" width=300 height=200>
//</applet>
3b String Class and String Buffer Calss
import java.io.*;
public class stringBuffer
{
public static void main(String[] args) throws Exception
{
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
String str;
try
{
//String
String s=new String("Welcome");
//length
System.out.println("String Length: "+s.length());
//concat
s=s.concat(" to BDU");
System.out.println("New String "+ s);
//charat
System.out.println("Character at 2nd position: "+s.charAt(2));
//Substring
System.out.println("Sub String: "+ s.substring(0,5));
//String Buffer
StringBuffer strbuf=new StringBuffer();
//append
strbuf.append("Hello");
strbuf.append("World");
System.out.println(strbuf);
//insert
strbuf.insert(5,"_Java ");
System.out.println(strbuf);
//reverse
strbuf.reverse();
System.out.print("Reversed string : ");
System.out.println(strbuf);
strbuf.reverse();
System.out.println(strbuf);
//setCharAt
strbuf.setCharAt(5,' ');
System.out.println(strbuf);
//charAt
System.out.print("Character at 6th position : ");
System.out.println(strbuf.charAt(6));
//substring
System.out.print("Substring from position 3 to 6 : ");
System.out.println(strbuf.substring(3,7));
//deleteCharAt
strbuf.deleteCharAt(3);
System.out.println(strbuf);
//capacity
System.out.print("Capacity of StringBuffer object : ");
System.out.println(strbuf.capacity());
}
catch(StringIndexOutOfBoundsException e)
{
System.out.println(e.getMessage());
}
}
}
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