JAVA程序运行顺序怎么看_java程序中的运行顺序

java程序的运行顺序有点乱，今天写一个测试程序：

得出的结论如下：

1. 静态成员变量/程序块按先后顺序先运行，先父类后子类

2. 子类main方法

3. new子类对象

4. 父类非静态成员变量(默认初始化/初始化)/程序块先后顺序先运行

5. 父类构造方法

6. 子类非静态成员变量(默认初始化/初始化)/程序块先后顺序先运行

7. 子类构造函数

class Father {

public static String var="father";

{

var="mother";

System.out.println("Father: non static code block: var = "+ var);

}

private int a = 1;

{

System.out.println("Father: non static code block: a = "+ a);

}

static{

System.out.println("Father: static code block: var = " + var);

}

Father(){

System.out.println("Father constructor");

}

public void test(){

System.out.println("father test method");

}

}

public class Child extends Father{

public String var = "Child";

private static int a;

{

var = "another_child";

System.out.println("Child: no static code block: var = " + var);

}

static{

System.out.println("Child: static code block: before--a = " + a);

a = 10;

System.out.println("Child: static code block: after--a = " + a);

}

Child(){

System.out.println("Child constructor");

}

public void test(){

System.out.println("Child test method");

}

public static void main(String[] args){

System.out.println("enter Child main method");

Father ts = new Father();

ts.test();

ts = new Child();

ts.test();

}

}