• 2022-06-09
    下列程序的执行结果是 public class TestDemo { public void fun() { static int i = 0; i++; System.out.println(i); } public static void main(String args[]) { Demo d = new Demo(); d.fun(); } }
  • 编译错误

    举一反三

    内容

    • 0

      下列ABCD注释标注的哪行代码有错public class Demo { public static void main(String args[]) { System.out.println("Java"); system.out.println("hello"); System.out.println("你好"); } } A: public class Demo B: public static void main(String args[]) C: system.out.println("ok"); D: System.out.println("您好");

    • 1

      下列程序运行结果是 public class Demo { public static void main(String[] args) { Object obj=new Father(){ public void show(){ System.out.println("helloworld"); } }; obj.show(); } } class Father{ public void show(){ System.out.println("hello father"); } }

    • 2

      阅读下面的程序,输出结果是()public class TestDemo{int m=5;public void some(int x){m=x;}public static void main(String args[]) {new Demo().some(7);}}class Demo extends TestDemo{int m=8;public void some(int x) {super.some(x);System.out.println(m);}} A: 5 B: 8 C: 7 D: 编译错误

    • 3

      (7-1)以下程序的运行结果是( )。 class A{ A(){ System.out.print(10); } } public class Demo extends A { public static void main(String[] args) { new A(); new Demo(); } }

    • 4

      下列程序的运行结果是( )class Demo{private String name;Demo(String name){this.name = name;}private static void show(){System.out.println(name)}public static void main(String[] args){Demo d = new Demo(“lisa”);d.show();}}