swing_AbstractTableModel 創建表格
阿新 • • 發佈：2017-07-29
ted obj getclass [] over listener rep 處理 dell
1 import javax.swing.table.AbstractTableModel; 2 3 public class MyTable extends AbstractTableModel { 4 /** 5 * 6 */ 7 private static final long serialVersionUID = 1L; 8 Object[][] p = { 9 { "11", "Taipei", new Integer(66), new Integer(32),10 new Integer(98), new Boolean(false), new Boolean(false) }, 11 { "22", "ChiaYi", new Integer(85), new Integer(69), 12 new Integer(154), new Boolean(true), new Boolean(false) }, 13 { "33", "ChiaYi", new Integer(85), new Integer(69),14 new Integer(154), new Boolean(true), new Boolean(false) }, 15 { "44", "ChiaYi", new Integer(85), new Integer(69), 16 new Integer(154), new Boolean(true), new Boolean(false) } 17 }; 18 String[] n = { "姓名", "居住地", "語文", "數學", "總分", "及格" };19 20 public int getColumnCount() { 21 return n.length; 22 } 23 24 public int getRowCount() { 25 return p.length; 26 } 27 28 public String getColumnName(int col) { 29 return n[col]; 30 } 31 32 public Object getValueAt(int row, int col) { 33 return p[row][col]; 34 // return null; 35 } 36 37 public Class getColumnClass(int c) { 38 return getValueAt(0, c).getClass(); 39 // return null; 40 } 41 42 public boolean isCellEditable(int rowIndex, int columnIndex) { 43 return true; 44 } 45 46 public void setValueAt(Object value, int row, int col) { 47 p[row][col] = value; 48 fireTableCellUpdated(row, col); // 該方法觸發TableModelEvent 事件，tableChanged()會進行相應的處理 49 } 50 51 public void mySetValueAt(Object value, int row, int col) { 52 p[row][col] = value; 53 //fireTableCellUpdated(row, col); //此處不能有，否則會陷入對自身的調用，導致內存溢出。 54 } 55 }
1 import java.awt.BorderLayout; 2 import java.awt.Dimension; 3 import java.awt.event.WindowAdapter; 4 import java.awt.event.WindowEvent; 5 import javax.swing.DefaultCellEditor; 6 import javax.swing.JComboBox; 7 import javax.swing.JFrame; 8 import javax.swing.JLabel; 9 import javax.swing.JScrollPane; 10 import javax.swing.JTable; 11 import javax.swing.event.TableModelEvent; 12 import javax.swing.event.TableModelListener; 13 14 public class TableEventHandle implements TableModelListener { 15 JTable table = null; 16 MyTable mt = null; //tableModel 17 JLabel label = null; 18 19 public TableEventHandle() { 20 JFrame f = new JFrame(); 21 mt = new MyTable(); 22 mt.addTableModelListener(this); 23 table = new JTable(mt); 24 25 JComboBox c = new JComboBox(); 26 c.addItem("Taipei"); 27 c.addItem("ChiaYi"); 28 c.addItem("HsinChu"); 29 table.getColumnModel().getColumn(1) 30 .setCellEditor(new DefaultCellEditor(c)); 31 32 table.setPreferredScrollableViewportSize(new Dimension(550, 100)); //設置表格默認展現視圖大小 33 34 35 JScrollPane s = new JScrollPane(table); //滾動條 36 f.getContentPane().add(s, BorderLayout.CENTER); 37 38 39 label = new JLabel("修改字段位置："); 40 f.getContentPane().add(label, BorderLayout.SOUTH); 41 42 f.setTitle("TableEventHandle"); 43 f.pack(); 44 f.setVisible(true); 45 f.addWindowListener(new WindowAdapter() { 46 public void windowClosing(WindowEvent e) { 47 System.exit(0); 48 } 49 }); 50 } 51 52 @Override 53 public void tableChanged(TableModelEvent e) { 54 int row = e.getFirstRow(); 55 int column = e.getColumn(); 56 57 label.setText("修改字段位置：" + (row + 1) + "行" + (column + 1) + "列"); 58 59 boolean cheat = ((Boolean) (mt.getValueAt(row, 6))).booleanValue(); 60 int grade1 = ((Integer) (mt.getValueAt(row, 2))).intValue(); 61 int grade2 = ((Integer) (mt.getValueAt(row, 3))).intValue(); 62 63 int total = grade1 + grade2; 64 65 66 67 if (cheat) { 68 if (total > 120) 69 mt.mySetValueAt(new Integer(119), row, 4); //只更新值，不觸發事件。改為mt.setValueAt()也可。但會不斷觸發事件，java應該做了相應處理，否則會內存溢出。 70 else 71 mt.mySetValueAt(new Integer(total), row, 4); 72 mt.mySetValueAt(new Boolean(false), row, 5); 73 } else { 74 if (total > 120) 75 mt.mySetValueAt(new Boolean(true), row, 5); 76 else 77 mt.mySetValueAt(new Boolean(false), row, 5); 78 mt.mySetValueAt(new Integer(total), row, 4); 79 } 80 81 82 83 table.repaint(); 84 } 85 86 87 88 public static void main(String args[]) { 89 new TableEventHandle(); 90 } 91 92
swing_AbstractTableModel 創建表格