英文:
java: how to write a conditional if statement like "if not (A empty) and (B empty) then"
问题
在Java中，我需要测试在单击按钮时至少有两个单选按钮组中的一个（radiogroup1和radiogroup2）不为空（即所有单选按钮都不为空且至少有一个单选按钮被选中）。
代码结构大致如下：
按钮被点击 {
如果 (radiogroup1 不为空) 或者 (radiogroup2 不为空) {
// 执行某些操作
}
}
当两个单选按钮组都为空时，单击按钮不会触发任何操作。
现在，我设置了类似这样的内容：
if (RadioGroup.getCheckedRadioButtonId() == -1 || RadioGroup2.getCheckedRadioButtonId() == -1) {
// 执行某些操作
}
但实际上我需要的是完全相反的条件。我不知道如何用 != 或其他方式来反转条件。
任何帮助将不胜感激！
英文:
In Java, I need to test that at least 1 of 2 radio groups (radiogroup1 and radiogroup2) is not empty when clicking on a button (i.e., all radio buttons shall not be empty AND at least one radio button is pressed).
The code structure would be something like:
button is pressed {
if (radiogroup1 not empty) or (radiogroup2 not empty) {
//do something
}
}
If both radiogroups are empty, nothing happens when the button is pressed.
Now, I set up something like this:
if (RadioGroup.getCheckedRadioButtonId() == -1 || RadioGroup2.getCheckedRadioButtonId() == -1) {
//do something
}
but I need actually exactly the opposite. I don't succeed to invert the condition with != or something else.
Any help appreciated!
答案1
得分: 1
你是指像这样吗？
RadioGroup radioGroup1; // 假设在代码的其他地方已初始化
RadioGroup radioGroup2; // 假设在代码的其他地方已初始化
// 检查两个单选按钮组中是否至少有一个被选中
if (radioGroup1.getCheckedRadioButtonId() != -1 ||
radioGroup2.getCheckedRadioButtonId() != -1) {
// 进行操作
}
英文:
You mean like this?
RadioGroup radioGroup1; // assumed initialized someplace else in code
RadioGroup radioGroup2; // assumed initialized someplace else in code
// Check to see if at least one of the two radio groups has a selection
if (radioGroup1.getCheckedRadioButtonId() != -1 ||
radioGroup2.getCheckedRadioButtonId() != -1) {
// Do stuff
}
答案2
得分: 1
也许是这样的？
if (!(RadioGroup.getCheckedRadioButtonId() == -1 || RadioGroup2.getCheckedRadioButtonId() == -1)) {
//做一些操作
}
英文:
May be this?
if (!(RadioGroup.getCheckedRadioButtonId() == -1 || RadioGroup2.getCheckedRadioButtonId() == -1))
{
//do something
}
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