JAVA类生命周期 通过代码实例解析JAVA类生命周期

public class TestClass {

  public static int k=0;

  public static TestClass t1=new TestClass("t1");
  public static TestClass t2=new TestClass("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 TestClass(String str) {
    System.out.println((++k)+""+str+"i="+i+"n="+n);
    ++n;
    ++i;
  }

  public static int print(String str){
    System.out.println((++k) +":" + str + "  i=" + i + "  n=" + n);
    ++n;
    return ++ i;
  }

  public static void main(String[] args){
    System.out.println("=========start============");
    TestClass t = new TestClass("init");
    System.out.println("=========end============");
  }
}

1:j  i=0  n=0
2:构造块  i=1  n=1
3t1i=2n=2
4:j  i=3  n=3
5:构造块  i=4  n=4
6t2i=5n=5
7:i  i=6  n=6
8:静态块  i=7  n=99
=========start============
9:j  i=8  n=100
10:构造块  i=9  n=101
11initi=10n=102
=========end============