14. 58. 20. 表格选择与监听事件 Table Selection Events and Listeners

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

public class JTableListSelectionListener {

public static void main(String[] args) {
JFrame f = new JFrame("JTableListSelectionListener");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

final JTable table;
String[] columnTitles = {"A","B","C","D"};
Object[][] rowData = {{ "11", "12", "13", "14" }, { "21", "22", "23", "24" },
{ "31", "32", "33", "34" }, { "41", "42", "44", "44" } };
table = new JTable(rowData,columnTitles);

table.setCellSelectionEnabled(true);//设置此表是否允许同时存在行选择和列选择。
//返回用来维持行选择状态的 ListSelectionModel。
//此接口表示任何组件的当前选择状态，该组件显示一个具有稳定索引的值列表。
ListSelectionModel cellSelectionModel = table.getSelectionModel();
//单选,只能选择一个单元格
cellSelectionModel.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);

cellSelectionModel.addListSelectionListener(new ListSelectionListener(){

public void valueChanged(ListSelectionEvent e) {//单元格值变动事件
String selectedData = null;
int[] selectedRow = table.getSelectedRows();//被选择的行
int[] selectedColumns = table.getSelectedColumns();//被选择的列

for(int i = 0; i < selectedRow.length; i++){//循环取出
for(int j = 0; j < selectedColumns.length; j++){
selectedData = (String)table.getValueAt(selectedRow[i], selectedColumns[j]);
}
}
System.out.println("选择的: " + selectedData);
}
});

f.add(new JScrollPane(table));
f.setSize(300,200);
f.setVisible(true);
}

}