小编Sch*_*lli的帖子

我只是试着设置一个变量,告诉我超级构造函数已经完成而没有浪费我的代码.所以我记得如何初始化类变量; 在超级构造函数之后但在类构造函数之前.但是如果你看一下这个例子,有一些奇怪的事情:

public class Init {

    public Init() {
        System.out.println("Init instance of " + this.getClass().getSimpleName());
        System.out.println("syso Init:");
        this.syso(false);
    }

    protected void syso(boolean childCall) {
        System.out.println("should not be printed because the method is overwitten");
    }

    public static class Child extends Init {

        private final boolean finalTrueA = true;
        private final boolean finalTrueB;
        private final boolean finalTrueC;

        private boolean nonFinalTrueA = true;
        private boolean nonFinalTrueB;
        private boolean nonFinalTrueC;

        {
            this.finalTrueB = true;
            this.nonFinalTrueB = true;
        }

        public Child() {
            super();
            this.finalTrueC = …