Question

java 静态方法和非静态变量的问题

public class Beetle extends Insect {
private int k = print("Beetle.k initialized");

public Beetle() {
System.out.println("k = " + k);
System.out.println("j = " + j);
}
private static void dd()
{
System.out.println("dd ");
}
private static int x2 =
print("static Beetle.x2 initialized");
public static void main(String[] args) {
System.out.println("Beetle constructor");
Beetle b = new Beetle();

}
}

class Insect {
private int i = 9;
protected int j;
private int p=print(" Insect.p initialized");
private static int x1 =print("static Insect.x1 initialized");
Insect() {
System.out.println("i = " + i + ", j = " + j);
j = 39;

}

static int print(String s) {
System.out.println(s);
return 47;
}

}

static Insect.x1 initialized
static Beetle.x2 initialized
Beetle constructor
Insect.p initialized
i = 9, j = 0
Beetle.k initialized
k = 47
j = 39
运行结果如下 其中不明白的是
K怎么等于47的， static int print(String s)这个是静态办法 private int k = print("Beetle.k initialized");这个是非静态属性，

Answer 1

非静态的方法、变量可以操作（包含引用、修改其值，方法调用等）静态的方法、变量；反之，静态的方法、变量则不能操作非静态的方法、变量，静态的只能操作静态的（这么一说，好像静态的很吃亏哦）。