Auto commit

Main.java

+import javax.swing.text.Element;
+import javax.swing.text.DefaultStyledDocument.ElementSpec;
+
 class Main {
   public static void main(String[] args) {
-    System.out.println("Hello world!");
+    //关于分支结构的一种例题:if elseif的Demo
+    double price = 300;
+    if(price>=2000){
+      price*=0.5;
+    }else if(price>=1000){
+      price*=0.7;
+    }else if(price>=500){
+      price*=0.8;
+    }else {
+      price*=0.9;
+    }
+    System.out.println("最终的消费金额为"+price);
+    
   }
 }
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