Java 条件事件处理程序
我可以让匿名事件处理程序方法像条件一样工作吗Java 条件事件处理程序,java,events,jpanel,actionevent,Java,Events,Jpanel,Actionevent,我可以让匿名事件处理程序方法像条件一样工作吗 JButton activeDataBtn = new JButton("Active"); activeDataBtn.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { try { if (activeDataPanel.setVisible(false)) { //Erroneous code
JButton activeDataBtn = new JButton("Active");
activeDataBtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
try {
if (activeDataPanel.setVisible(false)) { //Erroneous code
readDataFromFile(); //a method reads data from .csv
//file and shows it on activeDataPanel
activeDataPanel.setVisible(true);
}
else
activeDataPanel.setVisible(false);
}
}
});
如何使此有条件?当然可以,但该代码无效:
if (activeDataPanel.setVisible(false))
也许您想检查面板是否可见,请尝试以下方法:
if (activeDataPanel.isVisible())
或者可能
activeDataPanel.getVisible()
我现在不确定它的getter名称:)有什么建议吗