try-catch-finally 基础小记

finally ：不管是否异常都会进入

测试1

@Test
	public void test2() {
		try {
			int i =100/0;
			System.out.println(i);
		} catch(Exception e){
			System.out.println(1);
		}finally {
			System.out.println(2);
		}
	}

 测试2：带有 return 也会进入finally

public String fun1() {
		try {
			int i =100/3;
			System.out.println(i); 
			return "try 结果";
		} catch(Exception e){
			System.out.println(1);
			return "异常";
		}finally {
			System.out.println(2);
			//return "finally";
		}
	}

测试3：finall有不会影响返回结果

public String fun1() {
		int i =100;
		try {
			i++;
			System.out.println(i); 
			return "结果";
		} catch(Exception e){
			i++;
			System.out.println("catch="+i);
			return "异常";
		}finally {
			i=10;
			System.out.println(i);
			//return "finally";
		}
	}

测试4： finally里return 会中断 运行， 直接返回

public String fun1() {
		int i =100;
		try {
			i++;
			System.out.println(i); 
			return "结果";
		} catch(Exception e){
			i++;
			System.out.println("catch="+i);
			return "异常";
		}finally {
			i=10;
			System.out.println(i);
			return "finally";
		}
	}

测试5： finally 出现异常，抛出异常，中断程序

public String fun1() {
		int i =100;
		try {
			i++;
			System.out.println(i); 
			return "结果";
		} catch(Exception e){
			i++;
			System.out.println("catch="+i);
			return "异常";
		}finally {
			i=100/0;
			System.out.println(i);
			//return "finally";
		}
	}