Java Example Event Programming

Book Program

class x

{

int a;

float f;

}

class y extends x

{

double c;

}

class clas

{

public static void main(String arg[])

{

x xx = new x();

y yy = new y();
Class ob;

ob = xx.getClass();

System.out.println("xx is object of type : " + ob.getName());

ob = yy.getClass();

System.out.println("yy is object of type : " + ob.getName());

ob = ob.getSuperclass();

System.out.println("y's superclass is : " + ob.getName());

}

}

class disp

{

public static void main(String a[])



{ System.out.println(a.length); for(int<br />i=0; i<a.length;i++>){



System.out.println(a[i]);

}

}
}

class init

{

public static void main(String[] arg)

{

int k;

int n=!1;

System.out.println(n);
System.out.println(arg[0]);

}

}

class out

{

int i=20;
private int j=30;

public int k =40;

protected int l=50;

public void m()

{

in inn = new in();

inn.inmethod();

}

public void mpu()

{

System.out.println("Pub");

}

public void mpr()

{
System.out.println("Pri");

}

void mde()

{

System.out.println("default");

}

class in

{

int j=10;

public void inmethod()

{

System.out.println("Inner method" + (i+j+k+l));

mpr();

mpu();

mde();

System.out.println("this j"+j);

// m();

}

}
}
class inner

{

public static void main(String arg[])

{
out o = new out();

o.m();

}

}

class math

{

public static void main(String arg[])

{
System.out.println(Math.random());
System.out.println(Math.E);

System.out.println(Math.PI);

System.out.println(4^5);

}

}

class mem

{

public static void main(String arg[])

{

Runtime r = Runtime.getRuntime();
long mem1,mem2;

int i;

Integer in[] = new Integer[1000];

System.out.println("total memory " + r.totalMemory());

mem1 = r.freeMemory();

System.out.println("Free memory " + mem1);

r.gc();

mem1 = r.freeMemory();

System.out.println("Free memory after garbage " + mem1);

for(i=0;i<1000;i++)

in[i] = new Integer(i);

mem2 = r.freeMemory();

System.out.println("Free memory after decl" + mem2);

System.out.println("diff " + (mem1-mem2));

r.gc();

r.gc();

r.gc();

mem2 = r.freeMemory();

System.out.println("Free memory after gc " + mem2);

}

}

class meth

{

public static void p(String s)

{
System.out.println(s);

}

static

{

p("hello");

}
public static void main(String a[])
{

p("hi");

char k='f';

switch(k)
{

case 'f' :

p("true");

break;

case 'a':
p("false");
break;

default :

p("default");

}

}

}

public class priclass

{

public static void main(String a[])

{

a ob1 = new a();

b ob2 = new b();

c ob3 = new c();

}

}

protected class a

{

public int k=33;
}
class b

{

public int j=23;

}

public class c

{

public int i=24;

}


class quest

{
public static void main(String arg[])

{

int i=7,j=8;

int n=(ij) % (i & j) ;

System.out.println(n);

}

}

/* static class s

{

System.out.println("hi");

}

*/

static class statclass

{

public static void main(String arg[])

{

s ss = new s();

}

}

import java.util.*;

class test19
{

public static void main(String g[])

{

Vector v = new Vector();

v.add("Radiant");

v.add("Software");

System.out.println(v.elementAt(0) + v.elementAt(1));

}
}