更多“现有:classTestA{publicvoidstart(){System.out.println("TestA");}}publicclassTestB”相关的问题
第1题
现有代码片段:Strings="123";Stringsl=S+456;请问sl的结果是哪项?()
A.123456
B.579
C.编译错误
D.运行时抛出异常
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第2题
现有:classPencil{publicvoidwrite(Stringcontent){System.out.println("Write",+content){}}classRubberPencilextendsPencil{publicvoidwrite(Stringcontent){System.out.println("RubberWrite"+content);}publicvoiderase(Stringcontent)}}执行下列代码的结果是哪项?()Pencilpen=newPencil();((RubberPencil)pen).write("Hello");
A.WriteHello
B.RubberWriteHello
C.编译失败
D.运行时抛出异常
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第3题
现有:classPencil{publicvoidwrite(Stringcontent){System.out.println("Write"+content);}}classRubberPencilextendsPencil{publicvoidwrite(Stringcontent){System.out.println("RubberWrite"+content);}publicvoiderase(Stringcontent){System.out.println("Erase"+content);}}执行下列代码的结果是哪项?()Pencilpen=newRubberPencil();pen.write("Hello");
A.WriteHello
B.RubberWriteHello
C.编译错误
D.运行时抛出异常
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第4题
现有:classThread2implementsRunnable{voidrun(){System.out.print("go");}publicstaticvoidmain(String[]args){Thread2t2=newThread2();Threadt=newThread(t2);t.start();}}结果为:()
A.go
B.编译失败
C.代码运行,无输出结果
D.运行时异常被抛出
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第5题
现有:classThread2implementsRunnable{voidrun(){System.out.print("go¨);}publicstaticvoidmain(String[]args){Thread2t2=newThread2();Threadt=newThread(t2);t.start();}}结果为:()
A.go
B.运行时异常被抛出
C.代码运行,无输出结果
D.编译失败
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第6题
现有:classThread2implementsRunnable{voidrun(){System.out.print("go");}publicstaticvoidmain(String[]args){Thread2t2=newThread2();Threadt=newThread(t2);t.start();}}结果为:()
A.go
B.编译失败
C.代码运行,无输出结果
D.运行时异常被抛出
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第7题
现有:classTestApp{publicstaticvoidmain(String[]args){int[5]myarray={10,11,12,13,14);intsum=0;for(intx:myarray)sum+=x;System.out.println("sum="+sum);}}上述程序运行后的结果是哪项?()
A.sum=10
B.sum=70
C.sum=60
D.运行时抛出异常
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第8题
现有:classThreadBothextendsThreaaimplementsRunnable{publicvoidrun()(System.out.print("hi");}publicstaticvoiclmain(String[]args){Threadtl=newThreadBoth():Threadt2=newThread(tl):tl.run():t2.run():}结果为:()
A.hihi
B.hi
C.编译失败
D.运行时异常被抛出
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第9题
现有:classTestMain{staticintx=2;static{x=4;}publicstaticvoidmain(String...args){inty=x+1;System.out.println(y);}}和命令行:javaTestMain结果为:()
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