Initial commit

Example_src/Chapter1-10/src/ch07/throwsDemo.java

@@ -0,0 +1,26 @@
+package ch07;
+
+import java.io.IOException;
+import java.util.Scanner;
+
+public class throwsDemo {
+    public static void test() throws NullPointerException, IOException {
+        System.out.println("请输入一个数字（0，1）：");
+        Scanner in = new Scanner(System.in);
+        int flag = in.nextInt();
+        if (flag == 1)
+            throw new NullPointerException();
+        else
+            throw new IOException();
+    }
+
+    public static void main(String[] args) {
+        try {
+            test();
+        } catch (NullPointerException e) {
+            System.out.println("系统抛出了" + e.getClass() + "类型的异常");
+        } catch (IOException e) {
+            System.out.println("系统抛出了" + e.getClass() + "类型的异常");
+        }
+    }
+}