Java中類的初始化規則是：先初始化static成員變量和static塊，再初始化non-static成員變量和non-static塊，最後初始化構造函數。
例1：
package demo;
/**
* 此類主要介紹java類的加載順序
* */
public class TestOrder {
public static int k = 0;
public static TestOrder t1 = new TestOrder("t1");
public static TestOrder t2 = new TestOrder("t2");
public static int i = print("i");
public static int n = 99;
private int a = 0;
public int j = print("j");
{
print("構造塊");
}
static {
print("靜態塊");
}
public TestOrder(String str) {
System.out.println((++k) + ":" + str + " i=" + i + " n=" + n);
++i;
++n;
}
public static int print(String str) {
System.out.println((++k) + ":" + str + " i=" + i + " n=" + n);
++n;
return ++i;
}
public static void main(String args[]) {
TestOrder t = new TestOrder("init");
}
}1
其結果為：
1:j i=0 n=0
2:構造塊 i=1 n=1
3:t1 i=2 n=2
4:j i=3 n=3
5:構造塊 i=4 n=4
6:t2 i=5 n=5
7:i i=6 n=6
8:靜態塊 i=7 n=99
9:j i=8 n=100
10:構造塊 i=9 n=101
11:init i=10 n=102