java/se: add tcf note and exception flow

Author: zack.zhang

java/javase/javase-syntax/src/main/java/cn/edu/ntu/javase/syntax/tcf/ReturnTest.java

@@ -0,0 +1,75 @@
+package cn.edu.ntu.javase.syntax.tcf;
+
+import cn.edu.ntu.javase.common.model.Person;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * https://mp.weixin.qq.com/s/5XZUUpKQElTxNtbFo7IDNQ
+ *
+ * @author asd <br>
+ * @create 2022-10-10 02:08 PM <br>
+ * @project javase <br>
+ */
+@Slf4j
+public class ReturnTest {
+
+    public static void main(String[] args) {
+        System.out.println(tcfc());
+        System.out.println(tcff());
+        System.out.println(tcfcf());
+        System.out.println(tcfcf2());
+    }
+
+    // 10
+    public static int tcfc() {
+        int a = 10;
+        try {
+            int i = 1 / 0;
+        } catch (Exception e) {
+            return a;
+        } finally {
+            a = 20;
+        }
+        return 0;
+    }
+
+    // 28
+    public static Person tcff() {
+        Person p = new Person();
+        p.setAge(18);
+        try {
+            int i = 1 / 0;
+        } catch (Exception e) {
+            return p;
+        } finally {
+            p.setAge(28);
+        }
+        return null;
+    }
+
+    // 2
+    public static int tcfcf() {
+        int a = 10;
+        try {
+            int i = 1 / 0;
+        } catch (Exception e) {
+            return a;
+        } finally {
+            return 2;
+        }
+    }
+
+    // 30
+    public static int tcfcf2() {
+        int a = 10;
+        try {
+            int i = 1 / 0;
+        } catch (Exception e) {
+            a = 20;
+            return a;
+        } finally {
+            a = 30;
+            return a;
+        }
+    }
+}