了解java中初始化过程

最新推荐文章于 2025-09-09 22:58:36 发布

转载最新推荐文章于 2025-09-09 22:58:36 发布 · 44 阅读

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原文链接：http://www.cnblogs.com/weiss/p/10267259.html

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#java

class Insect{
    private int i = 9;
    protected int j;
    Insect(){
        System.out.println("i = " + i + ", j = " + j);
        j = 39;
    }
    private static int x1 = printInit("static Insect.x1 initialized");
    static int printInit(String s) {
        System.out.println(s);
        return 47;
    }
}

public class Beetle extends Insect{
    private int k = printInit("Beetle.k initialized");
    public Beetle() {
//        super();
        System.out.println("k = " + k);
        System.out.println("j = " + j);
    }
    private static int x2 = printInit("static Beetle.x2 initialized");
    public static void main(String[] args) {
        System.out.println("Beetle constructor");
        Beetle b = new Beetle();
    }
} /* Output:
    static Insect.x1 initialized
    static Beetle.x2 initialized
    Beetle constructor
    i = 9, j = 0
    Beetle.k initialized
    k = 47
    j = 39
*/