举一反三
- 阅读下列的程序 public class Example { public static void main(String[] args) { new Father () { public void show() { System.out.println("helloworld"); } }.show(); } } class Father { public void show() { System.out.println("hellofather"); } } A. B. C. D.
- 下列的程序的运行结果是( )public class Example { public static void main(String[] args) { new Father () { public void show() { System.out.println("helloworld"); } }.show(); }}class Father { public void show() { System.out.println("hellofather"); }} A: hellofather B: helloworld C: 编译报错 D: 编译通过,运行报错
- 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"); } }
- 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"); } }
- 请阅读下面的程序,写出最终的结果: interface Inter { public void show(); } abstract class AbstractInter implements Inter { public void show() { System.out.println("AbstractInter show()"); } } class InterImpl extends AbstractInter { public void show() { System.out.println("InterImpl show()"); } } public class InterImplTest { public static void main(String[] args) { InterImpl i = new InterImpl(); i. show(); } }
内容
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中国大学MOOC: 下列代码中构造方法的返回类型是（）public class Village { Village () { System .out .println(“hiding in Village”) ; } public static void main( String args [ ]) { Village c =new Village ( ) ;}class Village { public static void main( String args [ ]) { Village c =new Village ( ) ; } Village () { System .out .println(“hiding in Village”) ; } }
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下面程序的运行结果是public class Demo { public static void main(String[] args) { new Object(){ public void show(){ System.out.println("helloworld"); } }.show(); }} A: 什么也不输出 B: helloworld C: 编译报错 D: 编译通过，运行报错
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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..."); } }
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【单选题】下列哪行代码有错误? public class Example{ public static void main(String args[]){ System.out.println("ok"); system.out.println("您好"); } } A. public class Example B. public static void main(String args[]) C. System.out.println("ok"); D. system.out.println("您好");
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public class Test{ public static void main(String[] args){ System.out.println(5/2); } }