membertest.java

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class Member{
int instanceVar;
static int classVar;
	void setInstanceVar(int i){
		instanceVar = i;
		classVar = i;   //实例方法可以访问类变量
	} 
	int getInstanceVar(){
		return instanceVar;
	}	
	static void setClassVar(int i){
		classVar = i;
	    //instanceVar = i ; 该语句不能执行，因为类方法不能访问实例变量 
	}
	static int getClassVar(){
	    return classVar;
	}	
}

public class MemberTest{
public static void main(String args[]){
	    Member m1 = new Member(),
		             m2 = new Member();
		m1.setInstanceVar(100);
		m2.setInstanceVar(200);
		m1.setClassVar(300);
		System.out.print("m1.instanceVar = "+m1.getInstanceVar());
		System.out.println("  m1.classVar = "+m1.getClassVar());
		System.out.print("m2.instanceVar = "+m2.getInstanceVar());
		System.out.println("  m2.classVar = "+m2.getClassVar());			       
	  }
}