鄙视阿里的笔试,研发的就考这么一题java,主要是初始化块和静态初始化块,搞清楚概念,很简单。
class="java" name="code">
public class Test1 {
public static int k = 0;
public static Test1 t1 = new Test1("t1");
public static Test1 t2 = new Test1("t2");
public static int i = print("i");
public static int n = 99;
public int j = print("j");
{
print("构造块");
}
static{
print("静态块");
}
public Test1(String str) {
System.out.println((++k)+":"+str+" i="+i+" n="+n);
++i;++n;
}
private static int print(String str) {
System.out.println((++k)+":"+str+" i="+i+" n="+n);
++n;
return ++i;
}
public static void main(String... strings) {
Test1 t = new Test1("init");
}
}
输出:
1:j i=0 n=0
2:构造块 i=1 n=1
3:t1 i=2 n=2
4:j i=3 n=3
5:构造块 i=4 n=4
6:t2 i=5 n=5
7:i i=6 n=6
8:静态块 i=7 n=99
9:j i=8 n=100
10:构造块 i=9 n=101
11:init i=10 n=102