单项选择题
public class Starter extends Thread {
private int x= 2;
public static void main(String[] args) throws Exception {
new Starter().makeItSo();
}
public Starter() {
x=5;
start();
}
public void makeItSo() throws Exception {
join();
x=x- 1;
System.out.println(x);
}
public void run() { x *= 2; }
}
What is the output if the main() method is rum?()
A. 4
B. 5
C. 8
D. 9
E. Compilation fails.
F. An exception is thrown at runtime.
G. It is impossible to determine for certain.
相关考题
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单项选择题
Runnable r = new Runnable() { public void run() { System.out.print(”Cat”); } }; Threadt=new Thread(r) { public void run() { System.out.print(”Dog”); } }; t.start(); What is the result?()
A. Cat
B. Dog
C. Compilation fails.
D. The code runs with no output.
E. An exception is thrown at runtime. -
单项选择题
public class Threads5 { public static void main (String[] args) { new Thread(new Runnable() { public void run() { System.out.print(”bar”); } }).start(); } } What is the result?()
A. Compilation fails.
B. An exception is thrown at runtime.
C. The code executes normally and prints “bar”.
D. The code executes normally, but nothing prints. -
单项选择题
public class Threads4 { public static void main (String[] args) { new Threads4().go(); } public void go() { Runnable r = new Runnable() { public void run() { System.out.print(”foo”); } }; Thread t = new Thread(r); t.start(); t.start(); } } What is the result?()
A. Compilation fails.
B. An exception is thrown at runtime.
C. The code executes normally and prints „foo”.
D. The code executes normally, but nothing is printed.
