异常：调用链顺序

在异常调用链当中：异常对象创建顺序(栈内进行)，和异常堆栈链显示顺序恰好相反(出栈顺序)

源码：

package lsh.element;

public class ExceptionChains {
    public static void main(String[] args) {
        try {
            method1();
        } catch (Exception2 e) {
            e.printStackTrace();
        }
    }

    public static void method1() throws Exception2 {// 靠近栈顶，所以消息先出栈；后实例化
        try {
            method2();
        } catch (Exception2 e) {
            throw new Exception2("New info from method1", e);
        }
    }

    public static void method2() throws Exception2 {// 靠近栈底，所以消息后出栈；先实例化
        throw new Exception2("New info from method2");
    }

}

class Exception2 extends Exception {
    private static final long serialVersionUID = 1L;
    static {
        System.out.println("Exception2 - static");
    }
    {
        System.out.println("Exception2 - instance");
    }

    Exception2(String msg) {
        super(msg);
        System.out.println("Exception2 - init");
    }

    public Exception2(String message, Throwable cause) {
        super(message, cause);
        System.out.println("Exception2 - init2");
    }
}

执行结果：

Exceptin2 - static
Exception2 - instance
Exception2 - init
Exception2 - instance
Exception2 - init2
lsh.element.Exception2: New info from method1
    at lsh.element.ExceptionChains.method1(ExceptionChains.java:16)
    at lsh.element.ExceptionChains.main(ExceptionChains.java:6)
Caused by: lsh.element.Exception2: New info from method2
    at lsh.element.ExceptionChains.method2(ExceptionChains.java:21)
    at lsh.element.ExceptionChains.method1(ExceptionChains.java:14)
    ... 1 more

以上：上半部分是栈内正常执行顺序；下半部分的异常信息顺序。