举一反三
- 18 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(); } } A: 编译错误 B: 0 C: 1 D: 运行成功,但不输出
- 下列程序的执行结果是[input=type:blank,size:4][/input] 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(); }} 未知类型:{'options': ['编译错误', '[tex=0.5x1.286]XgTIkslIRkUR8ajnRk2deg==[/tex]', '[tex=0.5x1.286]7rcVY9u25Rg5EdwYVzpzgg==[/tex]', '运行成功,但不输出'], 'type': 102}
- 有如下代码,则该程序运行时输出结果是。 class Test{ static int i=0; public void show() { i++; System.out.println(i); } } public class Demo { public static void main(String[] args) { Test test=new Test(); test.show(); } }
- 下列代码的执行结果是 。public class Test {public int aMethod(){static int i=0;i++;System.out.println(i);}public static void main(String args[ ]){Test test = new Test();test.aMethod();}}
- 下列程序运行结果是( ) public class Demo { public static void main(String[] args) { Demo demo = new Demo(); demo.show(new Car() { public void run() { System.out.println("demo run"); } }); } public void show(Car c) { c.run(); } }abstract class Car { public void run() { System.out.println("car run..."); } }
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();}}