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java - JComboBox 程序不会加载

问题描述

图1 第一张图片是 JComboBox 在代码中处于活动状态并且程序未加载。

图2 第二张图片是 JComboBox 被注释掉并且程序正在加载。

我的代码有问题吗？还是跟我的规格有关？

标签： java

解决方案

可能想尝试类似的东西：

String[] months = {"January", "February", "March", "April", "May", "June", "July", "August", "September", "November", "December"};
JComboBox monthsComboBox =new JComboBox(months);
monthsComboBox.setBounds(50, 50,90,20);    
frameVariableNameHere.add(monthsComboBox);        
frameVariableNameHere.add.setLayout(null);    
frameVariableNameHere.add.setSize(200,300);    
frameVariableNameHere.add.setVisible(true);

或尝试类似：

String[] months = new String[] {"January", "February", "March", "April", "May", "June", "July", "August", "September", "November", "December"};
JComboBox<String> months1 = new JComboBox<>(months);

其他资源：

https://www.javatpoint.com/java-jcombobox

https://www.codejava.net/java-se/swing/jcombobox-basic-tutorial-and-examples

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