public class A{ 
static  int xingS = 0; //類變量  
private int name = 0; //實例變量  
String id; //實例變量 
private String colorType; //實例變量  
private int size; //實例變量  
private static String depart; //類變量   f
inal String name="zwm"; //常量
}
public class B{  
public void main (String[] args){      
A son1= new A();      
A son2= new A();      
son1.xingS = 3;  // 等同于
A.xingS = 3;      
son1.name = 4 ;      
System.out.println(son2.xingS); //結果為3      
//類變量是針對所有對象的，所以son1改變xingS，son2的a也改變      
System.out.println(son2.name); //結果為0      
//實例只改變自身的，所以son1對象的name改變，不影響對象son2的name變量 
}
}