Question

这是我第一次使用这个论坛而且我对整个Java体验都不熟悉，所以如果这是一个非常简单的修复，请原谅我。

我正在尝试为学校制作这个项目，但我无法让我的if else声明工作。正如你所看到的，如果你进入近战或远程，一切都没问题，但如果不这样做，它会重定向你。我的问题是，即使你输入近战或远程，它也会先引导你进入if方法，之后它会立即将你重定向到else语句。

有谁知道如何解决这个问题？

newchamp.Type = JOptionPane.showInputDialog(null, "What type of champion have you summoned? (melee or ranged)", "Type", JOptionPane.PLAIN_MESSAGE);
        if (Type.equalsIgnoreCase("melee")) {
           JOptionPane.showMessageDialog(null,"You have now confirmed your champion, you can not edit anything from this point on.");
        }
        if (Type.equalsIgnoreCase("ranged")) {
              JOptionPane.showMessageDialog(null,"You have now confirmed your champion, you can not edit anything from this point on.");
        }
        else {
            JOptionPane.showMessageDialog(null,"You can only choose Melee or Ranged!");
            newchamp.Type = JOptionPane.showInputDialog(null, "What type of champion have you summoned? (Melee or Ranged)", "Type", JOptionPane.PLAIN_MESSAGE);
               JOptionPane.showMessageDialog(null,"You have now confirmed your champion, you can not edit anything from this point on.");

        }
    }
}

Answer 1

您的代码：

if(a) ...
if(b) ... else ...

所以在每种情况下（a true或false）如果b为false，它将进入else声明（至更具体地说，如果Type不等于ranged，则else部分将被执行。

我认为你想要的是

if(a) ... else if(b) ... else ...

使用您的代码：

if (Type.equalsIgnoreCase("melee")) {

} else if (Type.equalsIgnoreCase("ranged")) {

} else {

}

Answer 2

您需要使用if，else if，else构造。

if (Type.equalsIgnoreCase("melee")) {
  // ...
}
else if (Type.equalsIgnoreCase("ranged")) {
  // ...
}
else {
  // ...
}

Answer 3

这样做

String   type = JOptionPane.showInputDialog(null, "What type of champion have you summoned? (melee or ranged)", "Type", JOptionPane.PLAIN_MESSAGE);
            if (Type.equalsIgnoreCase("melee")) {
               JOptionPane.showMessageDialog(null,"You have now confirmed your champion, you can not edit anything from this point on.");
            }else if (type.equalsIgnoreCase("ranged")) {
                  JOptionPane.showMessageDialog(null,"You have now confirmed your champion, you can not edit anything from this point on.");
            }
            else {
                JOptionPane.showMessageDialog(null,"You can only choose Melee or Ranged!");
               type = JOptionPane.showInputDialog(null, "What type of champion have you summoned? (Melee or Ranged)", "Type", JOptionPane.PLAIN_MESSAGE);
                   JOptionPane.showMessageDialog(null,"You have now confirmed your champion, you can not edit anything from this point on.");
            }

Answer 4

确实

newchamp.Type = JOptionPane.showInputDialog(null, "What type of champion have you summoned? (melee or ranged)", "Type", JOptionPane.PLAIN_MESSAGE);
    if (Type.equalsIgnoreCase("melee")) {
       ..something..
    }
    else if (Type.equalsIgnoreCase("ranged")) {
          ..something..
    }
    else {
       ..something..
    }
}
}

为你工作？

if else语句不能正常工作

4 个答案: