以下代码段的输出结果是()Strings="Java World";System.out.print(s.index Of("a
以下代码段的输出结果是()Strings="Java World";System.out.print(s.index Of("a",4));
A.-1
B.O
C.1
D.4
以下代码段的输出结果是()Strings="Java World";System.out.print(s.index Of("a",4));
A.-1
B.O
C.1
D.4
A.122345
B.2.34567892345E11
C.12234
D.2.3456789234E10
A.helloworld
B.hello,world
C.HELLOWORLD
D.HELLO,WORLD
;Console.WriteLine("s="+s);}}
A.无内容输出
B.代码编译失败
C.打印输出null
D.打印输出s=null
A.正确运行,输出:B
B.正确运行,输出:A
C.运行时引发异常
D.编译时发生错误
A.thasbeencreated.
B.thasbeencreated. TiSrunning.
C.tiSrunning.
D.编译出错
A.正确运行,输出:A
B.编译时发生错误
C.正确运行,输出:B
D.运行时引发异常
下面程序段的输出结果是 classTest{ public static void main(Stringargs[]){ MyThread t=new MyThread(); t.displayOutput(”t has been createD) ”); t.start(); } } Class MyThread extends Thread{ public void displayOutput(Strings){ System.out.println(S); } public void run(){ displayOutput(”t is running.”); } }
A.thas been created. t is running.
B.thas been created
C.t is running.
D.编译出错
A.Chi
B.aaa
C.iii
D.ina
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