java下拉框怎么写,java下拉框怎么写

1. 我想用JAVA语句来实现一个表格下拉框,代码怎么写

/*DefaultTable.java*/import javax.swing.table.AbstractTableModel;public class DefaultTable extends AbstractTableModel{ private static final long serialVersionUID = 1L; private String[] titles={"姓名"，"年龄"，"性别"，"数学成绩"，"英文成绩"，"总分"，"是否及格"}； private Object[][] userInfo={{"李星华"，30，"男"，89,97,186,true}，{"李康"，23，"女"，90,93,183,false}， {"庄康健"，25，"男"，80,90,170,false}}; public int getRowCount() { return userInfo.length; } public int getColumnCount() { return titles.length; } public Object getValueAt(int rowIndex, int columnIndex) { return userInfo[rowIndex][columnIndex]; } public String getColumnName(int columnIndex){ return titles[columnIndex]; } public Class> getColumnClass(int columnIndex){ return this.getValueAt(0, columnIndex).getClass(); } public boolean isCellEditable(int rowIndex, int columnIndex){ return true; } public void setValueAt(Object newValue,int rowIndex, int columnIndex){ this.userInfo[rowIndex][columnIndex]=newValue; }}/*TableColumnMode.java*/import java.awt.BorderLayout;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import javax.swing.DefaultCellEditor;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JScrollPane;import javax.swing.JTable;public class TableColumnMode { private JFrame frame=new JFrame("表格窗口")； private JTable table=null; private DefaultTable defaultTable=new DefaultTable(); private JComboBox box=new JComboBox(); public TableColumnMode(){ table=new JTable(defaultTable); box.addItem("男")； box.addItem("女")； table.getColumnModel().getColumn(2).setCellEditor(new DefaultCellEditor(box)); JScrollPane scr=new JScrollPane(table); JPanel pan=new JPanel(); frame.add(pan,BorderLayout.NORTH); frame.add(scr,BorderLayout.CENTER); frame.setSize(370, 160); frame.setLocation(550,100); frame.setVisible(true); frame.addWindowListener(new WindowAdapter(){ public void windowClosing(WindowEvent arg0){ System.exit(1); } }); } public static void main(String[] args) { new TableColumnMode(); }}。

2. java swing里年份下拉框怎么写

this.jcombobox1.getselecteditem();

如果要让jtextfield1的值随jcombobox1的选择变化，则在event事件中选择“itemstatechanged”。jbuilder自动生成public void jcombobox1_itemstatechanged(itemevent e) {}后在该方法内添加代码格式如下：

public void jcombobox1_itemstatechanged(itemevent e) {

this.jtextfield1.settext("");

this.jtextfield1.settext(this.jcombobox1.getselecteditem().tostring());

}

//以下是jbuilder自动生成的事件监听器

class frame1_jcombobox1_itemadapter implements itemlistener {

private frame1 adaptee;

frame1_jcombobox1_itemadapter(frame1 adaptee) {

this.adaptee = adaptee;

}

public void itemstatechanged(itemevent e) {

adaptee.jcombobox1_itemstatechanged(e);

}

}

3. 怎样添加JAVA 下拉框

Choice choice=new Choice();

choice.add(你要显示的字符串)；

然后将choice添加到你的容器里

//然后添加监听器

choice.addItemListener(this);

下面写方法

public void itemStateChanged(ItemEvent e){

String name=choice.getSelectedItem();

//或者 int index=choice.getSelectedIndex();

//剩下的方法体自己根据需求写了

}

4. Java中关于下拉列表框

参见：

转到：第

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