What do I (Java) do with a sudden "break exception"?

3. Try-catchBlock

There are three scenarios in which code executes in a try statement block:

• The code in the try statement block executes properly without any exception, and the code for the catch statement block will not be executed.

import java.util.*;public class Count {        public static void main (String []args){            int a , b;            Scanner read = new Scanner(System.in);            try{                System.out.print("请输入a:");                a = read.nextInt();                System.out.print("请输入b:");                b = read.nextInt();                System.out.println("a+b="+(a+b));            }catch(InputMismatchException ex){                System.out.println("不可以，请输数字！");                }                System.out.println("<<<<欢迎使用！>>>>");        }}

Enter 100 and 200 after the program goes smoothly!

• An exception is generated during code execution in a try statement block, and the exception is consistent with the type of exception declared in the catch , then the remaining code in the try statement block is ignored, and thecatch The code for the statement block is executed.
  Or the above code, enter 100 and a after the program runs as follows:
  
• An exception is generated during code execution in a try statement block, but the exception thrown is not declared in the catch statement block, and the program terminates immediately.

4. try-catch-finallyBlock

Adding a finally block after the catch clause ensures that the code in thefinally block is always executed, regardless of whether an exception occurs.

• code example:

import java.util.*;public class Count {     public static void main (String []args){        int a , b;        Scanner read = new Scanner(System.in);        try{            System.out.print("请输入a:");            a = read.nextInt();            System.out.print("请输入b:");            b = read.nextInt();            System.out.println("a+b="+(a+b));        }catch(Exception ex){            System.out.println("不可以，请输数字！");        }finally{        System.out.println("<<<<欢迎使用！>>>>");        }     }}

• Operation Result:
  

5. Multiple CatchBlock

• A piece of code can produce multiple exceptions.
• The exception object declared by each catch block is checked in turn to find a catch block that performs the first match of the exception type thrown by the try , and then the catch block is ignored.
• The exception subclass must precede the exception parent class, such as:
  
  

--------------------------------------------------------------------------------------------------------------- ----------------------------------

What do I (Java) do with a sudden "break exception"?