举一反三
- 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”) ; } }
- 请看下面的程序代码,当 n 为( )值时,程序段将输出字符串 second。 [br][/br] switch(n) { [br][/br] case 0: System .out .println(“first”); [br][/br] case 1: [br][/br] case 2: System .out .println(“second”); break; [br][/br] default: System .out .println(“end”); [br][/br] }(2.0) A: 0 B: 1 C: 2 D: 以上都可以
- 请写出下列语句的输出结果： System.out.println(String....tring.valueOf(3>2));
- 下列输出结果为false的是( ) String s1 = new String("SUN"); String s2 = new String("SUN"); A: System.out.println(s1 == s2); B: System.out.println(s1.equals(s2)); C: System.out.println(s1 = s2); D: System.out.println(s1.equals("SUN"));
- 请阅读程序，然后写出程序运行结果。 public class Demo { public static void main(String args[]) { String s1 = new String("good"); String s2 = new String("GOOD"); String s3 = new String("good"); String s4 = "good"; boolean b1 = s1.equals(s2); boolean b2 = s1.equalsIgnoreCase(s3); boolean b3 = s2.endsWith("oD"); boolean b4 = (s1 == s4); System.out.println(b1); System.out.println(b2); System.out.println(b3); System.out.println(b4); } }
内容
- 0
中国大学MOOC: 写出程序段输出结果：String s1=new String(abc);String s2=abc;System.out.print((s1==s2)+,);System.out.println(s1.equals(s2));
- 1
【其它】下列语句段输出结果是: String str1= ”java”,str2=”java”; if(str1= =str2) System.out.println(“ 相等 ”); else System.out.println(“ 不相等 ”); 运行结果为:
- 2
请阅读下面的代码 String s1=new String(“abc”); String s2=sintern(); String s3=”abc”; System.out.println(s1==s2); System.out.println(s2==s3); System.out.println(s1==s3); 下列选项中,程序的输出结果为(): false true false|false false false|false false true|false true true
- 3
下列语句输出结果为( )。public class test{public static void main(String args []){String s1=new String("How");String s2=new String("How");System.out. println(!(s1 ==s2));} A: false B: true C: 1 D: 0
- 4
阅读下列程序，请写出该程序的功能。 import java. util.*; public class Class1{ public static void main(Srting args[]){ Date date1=new Date(); System. out. println (datel); String t=datel.toString(); int endPos=t.indexOf(｀C＇); t=t.substring(11,endPos); System. out println(t); } }