jMenu1.setText("文件");
jMenu1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent e) {
jMenu1_mouseClicked(e);
}
});
jMenuItem1.setText("打开");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuItem1_actionPerformed(e);
} ……………………
void jMenu1_mouseClicked(MouseEvent e) {
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );
}
void jMenuItem1_actionPerformed(MouseEvent e) {//这里修改
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );}
jMenu1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent e) {
jMenu1_mouseClicked(e);
}
});
jMenuItem1.setText("打开");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuItem1_actionPerformed(e);
} ……………………
void jMenu1_mouseClicked(MouseEvent e) {
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );
}
void jMenuItem1_actionPerformed(MouseEvent e) {//这里修改
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );}
menuitem的mouseclicked事件就不好用呢
难道它不触发鼠标点击事件?
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuItem1_actionPerformed(e);
}
jMenuItem1_actionPerformed(e)是一个方法名字,ActionListener把这个方法封装好了一个接口new java.awt.event.ActionListener,那么在jMenuItem1对象里面就可以操作这个接口,实现方法的回调(回调jMenuItem1_actionPerformed)
jMenuItem1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent e) {
jMenuItem1_mouseClicked(e);
}
});按理说,mouseclicked也该好使才对啊
好吧,你要用他也好
你这样:
jMenu1.setText("文件");
jMenu1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(MouseEvent e) {
jMenu1_mouseClicked(e);
}
});
jMenuItem1.setText("打开");
jMenuItem1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(ActionEvent e) {
jMenuItem1_mouseClicked(e);
} ……………………
void jMenu1_mouseClicked(MouseEvent e) {
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );
}
void jMenuItem1_mouseClicked(MouseEvent e) {
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );}
出错信息
"Frame1.java": Error #: 300 : method jMenuItem1_mouseClicked(java.awt.event.ActionEvent) not found in anonymous class of method jbInit() at line 86, column 8
void jMenuItem1_mouseClicked(ActionEvent e) {
JOptionPane.showMessageDialog(null, "打开", "打开" ,JOptionPane.INFORMATION_MESSAGE );}