java - actionPerformed 中的 CloneNotSupportedException

Question

在我的actionPerformed方法中，我调用克隆对象的“copy()”，但编译器给我这个错误:“java.awt.event.ActionListener;重写的方法不会抛出java.lang.CloneNotSupportedException”，我该怎么办？

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

谢谢

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. [...]

你必须处理它。

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