Java圖形界面——下拉框、列表框、滾動窗格組件

package com.test.swing; import javax.swing.*; import java.awt.*; public class Test0 extends JFrame{ JList jlist; //列表框 JComboBox jcb; //下拉框 JPanel jp1, jp2; //面板 JLabel jlb1, jlb2; JScrollPane

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