单项选择题
public class Test{
public static void main(String[]args){
intx=5;
boolean b1=true;
boolean b2=false;
if((x==4)&&!b2)
System.out.print("l");
System.out.print("2");
if((b2=true)&&b1)
System.out.print("3");
}
}
What is the result?()
A.2
B.3
C.12
D.23
E.123
F.Compilation fails.
G.An exceptional ist hrown at runtime.
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多项选择题
35.String #name="Jane Doe";36.int$age=24;37.Double_height=123.5;38.double~temp=37.5;Which two are true?()
A.Line 35 will not compile.
B.Line 36 will not compile.
C.Line 37 will not compile.
D.Line 38 will not compile. -
单项选择题
现有: class ThreadExcept implements Runnable { public void run() { throw new RuntimeException("exception "); } public static void main(String [] args) { new Thread(new ThreadExcept()).start(); try { int x = Integer.parseInt(args[0]); Thread.sleep(x); System.out.print("main "); } catch (Exception e) { } } } 和命令行: java ThreadExcept 1000 哪一个是结果?()
A. main
B. 编译失败
C. 代码运行,但没有输出
D. main java.lang.RuntimeException: exception -
单项选择题
程序员想要创建一个名为MyThread的类以便在main方法中用Thread实例化。 对于下面三行: MyThread必须继承Thread。 MyThread必须实现Thread。 MyThread必须覆盖public void run()。 有几行是正确的?()
A. 0
B. 1
C. 2
D. 3
