静态方法可以重载但是不可以重写

重载例子

public class Test {
public static void test(){
System.out.println(“hello”);
}
public static void test(String s){
System.out.println(s);

}
public static void main(String args[]){
Test.test();
Test.test(“nihao”);

}
}

结果打印:
hello
nihao

重写例子

public class Test {
public static void test(){
System.out.println(“hello”);
}
public static void test(String s){
System.out.println(s);

}
class subClass extends Test{
public static void test(){

}
}
public static void main(String args[]){
Test.test();
Test.test(“nihao”);

}
}

发生错误。

将子类声明为静态静态类静态方法就可以重写了

public class Test {
public static void test(){
System.out.println(“hello”);
}
public static void test(String s){
System.out.println(s);

}
static class subClass extends Test{
public static void test(){
System.out.println(“wrong”);
}
}
public static void main(String args[]){
Test.test();
Test.test(“nihao”);
subClass.test();

}
}

结果打印：

hello
nihao
wrong