try catch finally用法

1.catch不到抛出的异常，则结束此函数的执行，抛出异常位置后面的代码都不执行

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("--- main() start --->");

		hello();

		testSeq();

		System.out.println("--- main() end <---");
	}

	public static void hello() {
		try {
			method();
		} catch (NullPointerException e) {
			e.printStackTrace();
			System.out.println("NullPointerException occured.");
		} finally {
			System.out.println("finally...");
		}

		System.out.println("after hello");
	}

	public static void method() {
//		throw new NullPointerException();
		throw new ArithmeticException();
	}

	public static String testSeq() {
		String result = "";
		int i = 0;

		try {
			i = 7 / i;
			System.out.println("in try...");
		} catch (NullPointerException e) {
			e.printStackTrace();
			System.out.println("In catch...");
		} finally {
			System.out.println("In finally....");
		}
		System.out.println("after...");

		return result;
	}
}

输出结果：

--- main() start --->
finally...
Exception in thread "main" java.lang.ArithmeticException
at com.min.Test.method(Test.java:35)
at com.min.Test.hello(Test.java:22)
at com.min.Test.main(Test.java:13)

2.catch到抛出的异常，则继续执行此函数，抛出异常位置后面的代码也执行

package com.min;


public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("--- main() start --->");

		hello();

		testSeq();

		System.out.println("--- main() end <---");
	}

	public static void hello() {
		try {
			method();
		} catch (NullPointerException e) {
			e.printStackTrace();
			System.out.println("NullPointerException occured.");
		} finally {
			System.out.println("finally...");
		}

		System.out.println("after hello");
	}

	public static void method() {
		throw new NullPointerException();
//		throw new ArithmeticException();
	}

	public static String testSeq() {
		String result = "";
		int i = 0;

		try {
			i = 7 / i;
			System.out.println("in try...");
		} catch (NullPointerException e) {
			e.printStackTrace();
			System.out.println("In catch...");
		} finally {
			System.out.println("In finally....");
		}
		System.out.println("after...");

		return result;
	}
}

输出结果：

--- main() start --->
java.lang.NullPointerException
at com.min.Test.method(Test.java:34)
at com.min.Test.hello(Test.java:22)
at com.min.Test.main(Test.java:13)
NullPointerException occured.
finally...
after hello
In finally....
Exception in thread "main" java.lang.ArithmeticException: / by zero
at com.min.Test.testSeq(Test.java:43)
at com.min.Test.main(Test.java:15)