Question

我是java的编程新手，并为我自己做了一些基础教程。我试图解决一个练习，告诉我做一个小程序，用户键入一个几秒钟的amonunt。然后该程序应该返回多少小时，分钟和秒。我无法理解错误消息。有人可以帮我吗？我的代码如下

import javax.swing.JOptionPane;
public class Time2
{
   public static void main( String args[] )
   {
      // Defining types of data:
      String secondstring;
      int minutes;
      int seconds;
      int hours;
      int seconds1;
      int seconds2;

      // Making inputwindow and initializing the variable sekondstring:
      secondstring = JOptionPane.showInputDialog( "Type in seconds!" );

      // Converting secondstring to type int:
      seconds = Integer.parseInt( secondstring );

      // Initializing the variables seconds, minutes and hour:
      hours = seconds / 3600;
      seconds1 = seconds % 3600;
      minutes = seconds1 / 60;
      seconds2 = seconds1 % 60;

      // Making output box:
      JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );

    } // End of main method.
} // End of class Time2

我尝试编译时收到以下错误消息：

Time2.java:28: ')' expected
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                ^
Time2.java:28: not a statement
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                           ^
Time2.java:28: ';' expected
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                                    ^
Time2.java:28: not a statement
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                                                       ^
Time2.java:28: ';' expected
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                                                               ^
Time2.java:28: not a statement
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                                                                                                 ^
Time2.java:28: ';' expected
    JOptionPane.showMessageDialog( null, "That will be " + hours "hours, " + minutes "minutes, and " + seconds2 "seconds.", "Result", JOptionPane.PLAIN_MESSAGE );
                                                                                                                                                               ^
7 errors

Answer 1

在每个hours，minutes和seconds2之后，您需要在双引号前添加+符号。

Answer 2

应该是这样的：

"That will be " + hours + "hours, " + minutes  + "minutes, and " + seconds2 + "seconds."

Answer 3

错误消息有点棘手。真正的问题在于：

秒2“秒。” （两个变量之间缺少“+”符号）

错误信息：'）'expect'and“not a statement”';'expect

3 个答案: