Question

所以我有两个类，一个类扩展了主类，我正在使用swing，当我想在主类中设置setTitle或其他东西时，我得到了：

Exception in thread "main" java.lang.UnsupportedOperationException: Not supported yet.
    at javaapplication5.PrviProzor.setTitle(PrviProzor.java:166)
    at javaapplication5.Timer1.main(Timer1.java:15)

这是Main类中的代码：

int opcija = JOptionPane.showOptionDialog(null, "Choose option", "Option dialog", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, new String[] {"Settings", "Close"}, null);
        if(opcija==JOptionPane.YES_OPTION){

            PrviProzor prviProzor = new PrviProzor();
            prviProzor.setTitle("Timer");
            prviProzor.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            prviProzor.setLocationRelativeTo(null);
            prviProzor.setVisible(true);

        }
        if(opcija==JOptionPane.NO_OPTION){
            exit();
        }

并且程序希望我将setTitle，setDefaultCloseOperation ..和其余方法放在第二类中，这些是默认方法：

void setTitle(String timer) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    void setDefaultCloseOperation(int EXIT_ON_CLOSE) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    void setLocationRelativeTo(Object object) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

    void setVisible(boolean b) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }


And the program still doesn't work, I still get the java.lang.UnsupportedOperationException. What should I do?

Answer 1

如何实现实际方法？

编辑：好的，以防万一有人仍然不了解它。

void setTitle(String timer) {
        throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

假设您自动生成了类，并且这是PrviProzor类中的实现，那么您需要将其实现为 real 。否则我只能说，您的代码按预期运行。

java.lang.StackOverflowError显示但我不知道为什么

1 个答案: