JComboBox 对象在 JButton 中的使用 java

Question

I want to use JComboBox object in JButton like if I select the desired text from JComboBox and click on button the image appear accorndingly, is it either possible or not, need help because I cant even make object of JCommbo in JButton.

Answer 1

你必须JComomboBox accessible from the ActionListener in order to get the selected text. You also need to use the proper method for getting the selected text, such as JComboBox#getSelectedItem()。考虑这个例子：

JComboBox<String> myComobBox = new JComboBox<String>();
JButton myButton =  new JButton("jButton");
myComboBox.addItem("6.A.M");
// Add button listener
myButton.addActionListener(e -> {
    // Use getSelectedItem instead of getText
    if(((String) myComboBox.getSelectedItem) == "6.A.M") {
         SixAMRoute sam = new SixAMRoute();
         sam.setVisible(true);
         this.dispose();
    }
});

如果您希望您的动作侦听器是它自己的 class，您将需要使用 access modifiers 使侦听器可以访问 JComboBox。

JComboBox 对象在 JButton 中的使用 java

JComboBox object use in JButton in java

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netbeans

jbutton

jcombobox