//StaticInitDemo.java

public class StaticInitDemo{
static int x=100;                           //初始化靜態變量x
static double y;
double z;
static {                                         //靜態初始化器
	  y=3.1415926;                       //初始化靜態變量y
}
StaticInitDemo(){                        //構造方法
z=y*x*x;                               //初始化實例變量z
}
public static void main(String args[]){
	  StaticInitDemo s1=new StaticInitDemo();
	  System.out.println("x= "+x);
	  System.out.println("y= "+y);
	  System.out.println("z= "+s1.z);
}
}