static block in java................

package staticblock;

public class Test {

{
System.out.println("ist instance block");
}

{
System.out.println("2nd instance block");
}

static
{
System.out.println("ist static block ");
}

static
{
System.out.println("2nd static block ");
}


public Test()
{
System.out.println("0- argument constructor");
}

public Test(int a)
{
System.out.println("1- argument constructor");
}

public static void main(String[] args)
{
Test t=new Test();
Test t1=new Test(10);

}


}

==============================================================================

o/p:------------
ist static block
2nd static block
ist instance block
2nd instance block
0- argument constructor
ist instance block
2nd instance block
1- argument constructor


===============================================================================================


package staticblock;

public class Test1 {


static int x;

static
{
x=100;
}

static void display()
{
System.out.println(Test1.x);
}

public static void main(String[] args) {
Test1.display();
}

}

==============================================================================================

o/p--------------

100

================================================================================================

package staticblock;

public class Test2 {


int x=100;//instance variable
static int y=200;//static variable
void m1(int a)//instance method
{
System.out.println("instance method");
}

static void m2(String s1)//static method
{
System.out.println("Static method");
}

Test2()
{
System.out.println("0-argument-constructor");
}

Test2(int a)
{
System.out.println("1-argument-constructor");
}

{
System.out.println("instance block");
}

static
{
System.out.println("static  block");
}


public static void main(String[] args) {
//static block execute
Test2 t=new Test2();//instance block,constructor
Test2 t1=new Test2(10);//instance block,constructor
t.m1(10);//m1 method execute
Test2.m2("govind");//m2 method execute

}

}


==============================================================================================
o/p:----------------
static  block
instance block
0-argument-constructor
instance block
1-argument-constructor
instance method
Static method