[OCAJP]while的用法

Given:

public class MyClass{
    public static void main(String[] args){
        while(int ii = 0; ii < 2){
            ii++;
            System.out.println("ii = " + ii);
        }
    }
}

What is the result?

A.

B. Compilation fails
C. The program prints nothing
D. The program goes into an infinite loop with no output
E. The program goes to an infinite loop outputting:

題解

此題的while迴圈用法錯誤，會造成編譯錯誤。如果要修正，可以改寫成：

public class MyClass{
    public static void main(String[] args){
        int ii = 0;
        while(ii < 2){
            ii++;
            System.out.println("ii = " + ii);
        }
    }
}

或是使用for迴圈改寫成：

public class MyClass{
    public static void main(String[] args){
        for(int ii = 0; ii < 2;){
            ii++;
            System.out.println("ii = " + ii);
        }
    }
}