Java基础----权限修饰符
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/*权限修饰符:本类同一个包下(子类和无关类)不同包下(子类)不同包下(无关类)private Y默认YYprotectedYYYpublicYYYY*/package com.liuyi;public class Father {private void show() {System.out.println("show");}void show2() {System.out.println("show2");}protected void show3() {System.out.println("show3");}public void show4() {System.out.println("show4");}public static void main(String[] args) {Father f = new Father();f.show();f.show2();f.show3();f.show4();}}
package com.liuyi;public class Son extends Father {public static void main(String[] args) {Father f = new Father();//f.show();f.show2();f.show3();f.show4();System.out.println("--------------");Son s = new Son();//s.show();s.show2();s.show3();s.show4();}}
package cn.qx;import com.liuyi.Father;public class Son2 extends Father {public static void main(String[] args) {Father f = new Father();//f.show();//f.show2();//f.show3();f.show4();System.out.println("--------------");Son2 s = new Son2();//s.show();//s.show2();s.show3();s.show4();}}
package com.liuyi;public class Test {public static void main(String[] args) {Father f = new Father();//f.show();f.show2();f.show3();f.show4();}}
package cn.qx;import com.liuyi.Father;class Test2 {public static void main(String[] args) {Father f = new Father();//f.show();//f.show2();//f.show3();f.show4();}}
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