网友您好, 请在下方输入框内输入要搜索的题目:
题目内容
(请给出正确答案)
如果在hello.java 中撰写以下程序代码: public class Hello { public static void main(String[] args) { System.out.println("Hello World"); } } 以下描述正确的是()。
A.执行时显示Hello World
B.执行时出现NoClassDefFoundError
C.执行时出现找不到主要方法的错误
D.编译失败
参考答案和解析
B
更多 “如果在hello.java 中撰写以下程序代码: public class Hello { public static void main(String[] args) { System.out.println("Hello World"); } } 以下描述正确的是()。A.执行时显示Hello WorldB.执行时出现NoClassDefFoundErrorC.执行时出现找不到主要方法的错误D.编译失败” 相关考题
考题
下列程序的运行结果是【 】。public class Test {public static void main (String args[]) {String s1="hello!";System.out.println (s1.toUpperCase());}}
考题
下面程序创建了一个线程并运行,请填空,使程序完整。public class ThreadTest {public static void main (String[] args) {Hello h=Hew Hello ();【 】t.start ();}}class Hello implements Runnable {int i;public void run () {while(true) {System.out.println("Hello" +i++);if(i==5) break;}}}
考题
通过实现Rmmable接口创建线程,请在下面横线处填写代码完成此程序。public class ThreadTest{public static void main(String args []){Thread testObj1 = new Thread (new Hello ());Thread testObj2 = new Thread (new Hello ());testObj 2.start ( );}}class Hello implements Runnable{int j;public void run(){System.out.println("Hello" + j ++);}}
考题
请在下划线处填入代码,是程序正常运行并且输出 “ Hello! ”Class Test 【 15 】 {Public static void main (String[] arge){Test t = new Test();t.start();}Public void run(){System.out.println( “ Hello! ” );}
考题
以下Java应用程序执行入口main方法的声明中,正确的是( )。
A.public static void main()B.public static void main(String[] args)C.public static int main(String[] args)D.public void main(String[] args)
考题
有下列程序段 public class fun { public static void main(String args[]) { char b[]="Hello,you"; b[5] = 0; System.out.println(s); } 执行此程序后,得到的输出结果是( )。A.Hello, youB.Hello0youC.HelloD.0
考题
使下列程序正常运行并且输出“Hello!”,横线处应填写的内容是( )。 class Test { public static void main(string[]args){ Test t=new Test; start; } Public void run{ System.out.println("Hello!¨); )A.extends ThreadB.extends FloatC.extends IostreamD.extends Stdio
考题
下列程序段的输出是( )。 public class Test { public static void main (String args[ ]) { String ss1 = new String("hello"); String ss2 = new String("hello"); System.out.println(ssl == ss2); System.out.println (ssequals(ss2)); } }A.true, falseB.true, trueC.false, trueD.false, false
考题
下列程序的输出结果是( )。 public class Test { public static void main (String[] args) { String s="hello"; s.replace ('r','m'); System.out.println(s); } }A.helloB.HELLOC.hemmoD.HEMMO
考题
下面程序段的输出结果为 public class MyClass { public static void main(String args[]) { String s="Hello! How are you?"; System.out.println(s.LastIndexOf("o",16); } }A.16B.oC.uD.17
考题
以下代码的输出结果?public class Test{public static void main(String argv[]){String x="hello";change(x);System.out.println(x);}static void change(String m){m=m+2;}}
A. helloB. hello2C. 编译报错D. 运行报错,不能将串与整数相加
考题
分析下列代码: Class A{ Public static void main(String[] args){ method(); } static void method(){ try{ System.out.println("Hello"); }finally{ System.out.println("good-bye"); } } } 编译运行后,输出结果是()。 A、"Hello"B、"good-bye"C、"Hello""god-bye"D、代码不能编译
考题
以下是JAVA中正确的入口方法是? () A、 public static void main(String[] args){}B、 public static void main(String args){}C、 public void main(String[] args){}D、 public static int main(String[] args){}
考题
Which declarations will allow a class to be started as a standalone program?() A、public void main(String args[])B、public void static main(String args[])C、public static main(String[] argv)D、final public static void main(String [] array)E、public static void main(String args[])
考题
public class Foo { public void main( String[] args ) { System.out.println( “Hello” + args[0] ); } } What is the result if this code is executed with the command line?()A、 HelloB、 Hello FooC、 Hello worldD、 Compilation fails.E、 The code does not run.
考题
class A { public A() { System.out.println(“hello from a”); } } class B extends A { public B () { System.out.println(“hello from b”); super(); } } public class Test { public static void main(String args[]) { A a = new B(); } } What is the result when main is executed?() A、 Compilation fails.B、 hello from aC、 hello from bD、 hello from b hello from aE、 hello from a hello from b
考题
class Super { public int i = 0; public Super(String text) { i = 1; } } public class Sub extends Super { public Sub(String text) { i = 2; } public static void main(String args[]) { Sub sub = new Sub(“Hello”); System.out.println(sub.i); } } What is the result?() A、 0B、 1C、 2D、 Compilation fails.
考题
分析下列Java代码: class A { public static void main(String[] args) { method(); } static void method() { try { System.out.println("Hello"); System.exit(0); } finally { System.out.println("good-bye"); } } } 编译运行后,输出结果是()。 A、"Hello"B、"good-bye"C、"Hello"后面是"good-bye"D、代码不能编译
考题
分析下列java代码 Class A{ Public static void main(String[] args){ Method(); } Static void method(){ try{ System.out.println(“hello”) }finally{ System.out.println(“good-bye”); } } } 编译运行后,输出结果是()A、“hello”B、“good-bye”C、“hello”“good-bye”D、代码不能编译
考题
public class X { public static void main (String[]args) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?() A、 The program runs and prints “Hello”B、 An error causes compilation to fail.C、 The program runs and prints “Hello world!”D、 The program runs but aborts with an exception.
考题
以下的Java程序代码中,错误的行是() A、 public class FirstAdd{ }B、 public static void main(String args[]){ }C、 注释:显示 “天天好心情!”D、 System.out.println(“天好心情!”);
考题
public class X { public static void main (Stringargs) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?() A、The program runs and prints “Hello”B、An error causes compilation to fail.C、The program runs and prints “Hello world!”D、The program runs but aborts with an exception.
考题
单选题class A { public A() { System.out.println(“hello from a”); } } class B extends A { public B () { System.out.println(“hello from b”); super(); } } public class Test { public static void main(String args[]) { A a = new B(); } } What is the result when main is executed?()A
Compilation fails.B
hello from aC
hello from bD
hello from b hello from aE
hello from a hello from b
考题
单选题public class X { public static void main (Stringargs) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?()A
The program runs and prints “Hello”B
An error causes compilation to fail.C
The program runs and prints “Hello world!”D
The program runs but aborts with an exception.
考题
单选题以下是JAVA中正确的入口方法是? ()A
public static void main(String[] args){}B
public static void main(String args){}C
public void main(String[] args){}D
public static int main(String[] args){}
考题
单选题public class Foo { public void main( String[] args ) { System.out.println( “Hello” + args[0] ); } } What is the result if this code is executed with the command line?()A
HelloB
Hello FooC
Hello worldD
Compilation fails.E
The code does not run.
考题
单选题public class X { public static void main (String[]args) { string s = new string (“Hello”); modify(s); System.out.printIn(s); } public static void modify (String s) { s += “world!”; } } What is the result?()A
The program runs and prints “Hello”B
An error causes compilation to fail.C
The program runs and prints “Hello world!”D
The program runs but aborts with an exception.
考题
单选题分析下列java代码 Class A{ Public static void main(String[] args){ Method(); } Static void method(){ try{ System.out.println(“hello”) }finally{ System.out.println(“good-bye”); } } } 编译运行后,输出结果是()A
“hello”B
“good-bye”C
“hello”“good-bye”D
代码不能编译
热门标签
最新试卷