//当break z 返回到z的时候，会不会再次开始循环？
public void go(){ 
    String o = ""; 
        z: 
        for(int x=0; x<3; x++){ 
            for(int y=0; y<2; y++){ 
                            if(x == 1) break; 
                            if(x==2 && y==1) break z; 
                            o = o + x + y; 
            } 
        } 
    System.out.println(o); 
} 


//5是怎么来的？
public class Test {
    public static void main(String[] args) {
        String[] colors = { "blue", "red", "green", "yellow", "orange" };
        Arrays.sort(colors);
        int s2 = Arrays.binarySearch(colors, "orange");
        int s3 = Arrays.binarySearch(colors, "violet");
        System.out.print(s2 + "" + s3);
    }
}


//为什么编译失败？
public class Test {
    public static void main(String[] args) {
        new Test.go("hi", 1);
        new Test.go("hi", "world", 2);
    }

    public void go(String... y, int x) {
        System.out.print(y[y.length - 1] + " ");
    }
}

public class Test {
    public static void main(String[] args) {
        new Test().go(1,"hi" );
        new Test().go(2,"hi", "world" );
    }

    public void go(int x,String... y) {
        System.out.print(y[y.length - 1] + " ");
    }
}