CloneNotSupportedException in actionPerformed

Question

在我的actionPerformed方法中，我調用「copy（）」克隆對象，但編譯器給我這個錯誤：「java.awt.event.ActionListener;重寫方法不會拋出java.lang.CloneNotSupportedException 「， 我能做什麼？

 public void actionPerformed(ActionEvent e){ 
    if (e.getSource() instanceof JButton) { 
     copy(); ... 

謝謝

Answer 1

You can not add throwed checked exception to a method while overriding it.

[...] the overriding method should not throw checked exceptions that are new or broader than the ones declared by the overridden method. [...]

你必須處理它。

@Override 
public void actionPerformed(ActionEvent e) { 
    //code 
    try { 
     copy(); 
    } catch (CloneNotSupportedException cnse) { 
     cnse.printStackTrace(); 
    } 
}