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这个出错信息是什么意思??
来源: 互联网 发布时间:2015-05-03
本文导语: HelloJava3 should be declared abstract; it does not define actionPerformed(java.awt.event.ActionEvent) in HelloJava3 public class HelloJava3 extends JComponent implements MouseMotionListener,ActionListener | 类HelloJava3 里应当实...
HelloJava3 should be declared abstract; it does not define actionPerformed(java.awt.event.ActionEvent) in HelloJava3
public class HelloJava3 extends JComponent implements MouseMotionListener,ActionListener
public class HelloJava3 extends JComponent implements MouseMotionListener,ActionListener
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类HelloJava3 里应当实现actionPerformed方法
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这是接口ActionListener的方法。
你没有实现actionPerformed。
你没有实现actionPerformed。