Java 为什么赢了'；该程序的最后一行输出是否显示在NetBeans上？

我正在尝试制作一个简单的“存储”程序，并在最后提示退出该程序。如果用户键入yes，它将退出。但如果他们说不，应该只打印一条消息，让他们知道他们可以继续购物。但由于某种原因，该消息并未出现。这是物体

public class HelloShopper1 {
   public static void main(String[] args) {
              Scanner scanner = new Scanner(System.in);
              System.out.print("Hello Shopper, what is your name?\n");
              String input = scanner.nextLine();
              if(!input.matches("[a-zA-Z_]+")) {
              System.out.println("Nice try " + input + " . Get out of my store!");
              } else {
             System.out.println("Thank you, " + input + ". It is my pleasure to help you today.");
             System.out.println("Do you want to close this program?");
             String input1 = scanner.nextLine();
             System.out.println(input1);
             if(input1 == "yes") {
             System.exit(0);
             if(input1 == "no") {
             System.out.println("Thank god. Please continue shopping.");
           }
        }
    }
}

---

不要使用

==

来比较字符串。使用

.equals（…）

或

.equalsIgnoreCase（…）

方法。了解

==

检查引用相等，而方法则执行您真正感兴趣的测试：函数相等。

import java.util.*;
public class HelloShopper1 
{
public static void main(String[] args) 
{
          Scanner scanner = new Scanner(System.in);
          System.out.print("Hello Shopper, what is your name?\n");
          String input = scanner.nextLine();
          if(!input.matches("[a-zA-Z_]+")) 
          {
          System.out.println("Nice try " + input + " . Get out of my 
       store!");
          }else{
         System.out.println("Thank you, " + input + ". It is my pleasure to 
         help you today.");
         System.out.println("Do you want to close this program?");
         String input1 = scanner.nextLine();
         if(input1.equalsIgnoreCase("yes")) 
         {
         System.exit(0);
         }
         if(input1.equalsIgnoreCase("no")) 
         {
         System.out.println("Thank god. Please continue shopping.");
         }
        }
       }
       }