为什么它会说'{'预计即使它在那里？ [英] Why does it say '{' expected even though it is there?

问题描述

编译程序后，出现以下错误：



java：11：'{'预期

公共类DebtRatioSwing.Java

^

java：40：'}'预计

}

^



//这两个错误都位于第一个和最后一个花括号。



我尝试过：

 import javax.swing.JOptionPane; 
 
公共类DebtRatioSwing.Java 
 {
 public static void main（String [] args）
 {
 //声明变量
 String strMonthlyIncome，strMortgage，strAutoLoan，strOtherDebt; 
每月双倍收入，抵押，汽车贷款，其他债务; 
 
 //从用户获取输入
 strMonthlyIncome = JOptionPane.showInputDialog（null，输入你的月收入：）; 
 strMortgage = JOptionPane.showInputDialog（null，输入抵押贷款的金额：）; 
 strAutoLoan = JOptionPane.showInputDialog（null，输入用于汽车贷款的金额：）; 
 strOtherDebt = JOptionPane.showInputDialog（null，输入花在其他债务上的金额：）; 
 
 
 //转换
 monthlyIncome = Integer.parseInt（strMonthlyIncome）; 
 mortgage = Integer.parseInt（strMortgage）; 
 autoLoan = Integer.parseInt（strAutoLoan）; 
 otherDebt = Integer.parseInt（strOtherDebt）; 
 
 //计算
双倍比率=（抵押+ autoLoan + otherDebt）/ monthlyIncome; 
 
 //输出
 JOptionPane.showMessageDialog（null，你的债务比率是;+（比率）+。，债务比率计算器，JOptionPane.PLAIN_MESSAGE）; 
 
 System.exit（0）; 
} 
} 

解决方案

删除。类名中的字符。

谢谢你们



问题是类名没有正确保存。

Once I compile my program the following error occurs:

java:11: '{' expected
public class DebtRatioSwing.Java
^
java:40: '}' expected
}
^

//Both errors are located at the first and last curly braces.

What I have tried:

import javax.swing.JOptionPane;

public class DebtRatioSwing.Java
{
   public static void main(String[] args)
   {
         //Declaring Variables
         String strMonthlyIncome, strMortgage, strAutoLoan, strOtherDebt;
         double monthlyIncome, mortage, autoLoan, otherDebt;

         //Get Input from User
         strMonthlyIncome=JOptionPane.showInputDialog(null, "Enter your monthly income: ");
         strMortgage=JOptionPane.showInputDialog(null, "Enter amount spent on mortgages: ");
         strAutoLoan=JOptionPane.showInputDialog(null, "Enter amount spent on automobile loans: ");
         strOtherDebt=JOptionPane.showInputDialog(null, "Enter amount spent on other debt: ");


         //Conversions
         monthlyIncome = Integer.parseInt(strMonthlyIncome);
         mortgage = Integer.parseInt(strMortgage);
         autoLoan = Integer.parseInt(strAutoLoan);
         otherDebt = Integer.parseInt(strOtherDebt);

         //Calculations
         double ratio = (mortgage + autoLoan + otherDebt)/ monthlyIncome;

         //Output
         JOptionPane.showMessageDialog(null, "Your Debt Ratio is; " + (ratio) + ".", "Debt Ratio Calculator",JOptionPane.PLAIN_MESSAGE);

         System.exit(0);
      }
}

解决方案

Remove the "." character in the class name.

Thanks guys

The problem was that the class name wasn't saved correctly.

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