Try-Finally执行顺序的经典面试题

try{} catch{} finally{}，finally一定都会去执行，常在finally进行释放锁、释放连接等操作。

案例一代码分析

package top.chenxi.test;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: chenxiky
 * @Date: 2022/06/03/13:36
 * @Description: try finally执行顺序
 */
public class FinallyTest {
    public static void main(String[] args) {

        try {
            System.out.println("chenxiky is test!!");
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            // Ctrl+Shift+U 小写转大写
            System.out.println("CHENXIKY IS TEST2!!");
        }
    }
}

执行结果如下：

chenxiky is test!!
CHENXIKY IS TEST2!!

先执行了try代码块，再执行finally代码块

案例二代码分析

package top.chenxi.test;

/**
 * Created with IntelliJ IDEA.
 *
 * @Author: chenxiky
 * @Date: 2022/06/03/13:36
 * @Description: try finally执行顺序
 */
public class FinallyTest {
    public static void main(String[] args) {
        System.out.println(chechReturn());
    }

    public static int chechReturn() {
        int i = 0;
        try {
            return ++i;
        } finally {
            return ++i;
        }
    }
}

执行结果如下：

2

先执行了try代码块，再执行finally代码块，最终返回结果