java多態說明

多態值得注意的地方:成員變量，和靜態方法是不存在多態的概念的

 

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package com.fengli;

/**
*
* @author Administrator
*/
public class BaseClass {

public int a =0;

public static void printString(){
System.out.println("base staitc String");
}

public void unStaticPrintString(){
System.out.println("base unStaitc String");
}

}

 

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

package com.fengli;

/**
*
* @author Administrator
*/
public class SubClass extends BaseClass{

public int a =1;

public static void printString(){
System.out.println("staitc String");
}

@Override
public void unStaticPrintString(){
System.out.println("unStaitc String");
}

public static void main(String[] args){
BaseClass bc = new SubClass();
System.out.println(bc.a); //輸出父類的值0
bc.printString(); //打印父類的printString base staitc String
bc.unStaticPrintString(); //打印子類的覆蓋方法 unStaitc String
}

}