在加载类之前执行,
public class Test {
private static int x;
private int y;
private int z;
static {
System.out.println("我是静态代码块");
x=100;
//y=100;//不能调用普通成员
}
public static void main(String[] args) {
Test test = new Test();
System.out.println(x);
}
}