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我有一个使用下面的代码从here如下功能:的Java:如何从“JOptionPane.showInputDialog”返回选择为“INT”,而不是“对象”
public static Object generationMode(){
Object[] possibleMode = { "M-Sequence", "Gold Code"};
Object selectedValue = JOptionPane.showInputDialog(null,
"Choose one", "Input",
JOptionPane.INFORMATION_MESSAGE, null,
possibleMode, possibleMode[0]);
return selectedValue;
}
我我在主类中调用了这个函数,并且它工作正常。然而,而不是“对象”,我想返回一个“int”到主类。我试图将返回值如下:
public static int generationMode(){
Object[] possibleMode = { "M-Sequence", "Gold Code"};
int selectedValue = JOptionPane.showInputDialog(null,
"Choose one", "Input",
JOptionPane.INFORMATION_MESSAGE, null,
possibleMode, possibleMode[0]);
return (int) selectedValue; // it breaks here
}
,但它无法正常工作。调试器在断点处说:(暂停(异常ClassCastException))!!!! 那到底是什么错误?