按下按钮后，Java将颜色设置为jtable
我有一个带有删除按钮的jtable，当我选择一行并单击删除按钮时我希望将该行设置为绿色。
然而，当我点击时，行颜色不会保留在那里，我选择的每一行都变成绿色而不是默认的蓝色
public class table extends javax.swing.JFrame {
DefaultTableModel model;
private boolean btnClicked = false;
public table() {
initComponents();
model = (DefaultTableModel) tbltable.getModel();
}
public class CustomTableCellRenderer extends DefaultTableCellRenderer {
public Component getTableCellRendererComponent(JTable table, Object obj, boolean isSelected, boolean hasFocus, int row, int column) {
Component cell = super.getTableCellRendererComponent(table, obj, isSelected, hasFocus, row, column);
if (isSelected) {
cell.setBackground(getBackground());
String type = (String) String.valueOf(model.getValueAt(tbltable.getSelectedRow(), 3));
if (("deleted").equals(type)) {
cell.setBackground(Color.GREEN);
}
}
return cell;
}
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
txtCol1 = new javax.swing.JTextField();
txtCol2 = new javax.swing.JTextField();
txtCol3 = new javax.swing.JTextField();
btnAdd = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
tbltable = new javax.swing.JTable();
btnEdit = new javax.swing.JButton();
btnDelete = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
txtCol1.setText("jTextField1");
txtCol2.setText("jTextField2");
txtCol3.setText("jTextField3");
btnAdd.setText("Add");
btnAdd.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnAddActionPerformed(evt);
}
});
tbltable.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"Col1", "Col2", "Col3", "Col4"
}
) {
Class[] types = new Class [] {
java.lang.Object.class, java.lang.Object.class, java.lang.Object.class, java.lang.String.class
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
});
tbltable.addMouseListener(new java.awt.event.MouseAdapter() {
public void mouseClicked(java.awt.event.MouseEvent evt) {
tbltableMouseClicked(evt);
}
});
jScrollPane1.setViewportView(tbltable);
btnEdit.setText("edit");
btnEdit.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnEditActionPerformed(evt);
}
});
btnDelete.setText("delete");
btnDelete.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnDeleteActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(92, 92, 92)
.addComponent(txtCol1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(txtCol2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(txtCol3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGroup(layout.createSequentialGroup()
.addGap(87, 87, 87)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 452, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createSequentialGroup()
.addComponent(btnAdd)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btnEdit)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(btnDelete)))))
.addContainerGap(283, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(32, 32, 32)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(txtCol1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(txtCol2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(txtCol3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btnAdd)
.addComponent(btnEdit)
.addComponent(btnDelete))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 273, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(95, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void btnAddActionPerformed(java.awt.event.ActionEvent evt) {
String chkcol = "notdeleted";
model.insertRow(model.getRowCount(), new Object[]{txtCol1.getText(), txtCol2.getText(), txtCol3.getText(), chkcol});
}
private void tbltableMouseClicked(java.awt.event.MouseEvent evt) {
txtCol1.setText(String.valueOf(model.getValueAt(tbltable.getSelectedRow(), 0)));
txtCol2.setText(String.valueOf(model.getValueAt(tbltable.getSelectedRow(), 1)));
txtCol3.setText(String.valueOf(model.getValueAt(tbltable.getSelectedRow(), 2)));
int rowIndex = tbltable.getSelectedRow();
System.out.println("rowIndex " + rowIndex);
}
private void btnEditActionPerformed(java.awt.event.ActionEvent evt) {
model.setValueAt(txtCol1.getText(), tbltable.getSelectedRow(), 0);
model.setValueAt(txtCol2.getText(), tbltable.getSelectedRow(), 1);
model.setValueAt(txtCol3.getText(), tbltable.getSelectedRow(), 2);
}
TableColumn tcol;
private void btnDeleteActionPerformed(java.awt.event.ActionEvent evt) {
model.setValueAt("deleted", tbltable.getSelectedRow(), 3);
if (String.valueOf(model.getValueAt(tbltable.getSelectedRow(), 3)).equals("deleted")) {
tcol = tbltable.getColumnModel().getColumn(0);
tcol.setCellRenderer(new CustomTableCellRenderer());
tcol = tbltable.getColumnModel().getColumn(1);
tcol.setCellRenderer(new CustomTableCellRenderer());
tcol = tbltable.getColumnModel().getColumn(2);
tcol.setCellRenderer(new CustomTableCellRenderer());
tcol = tbltable.getColumnModel().getColumn(3);
tcol.setCellRenderer(new CustomTableCellRenderer());
}
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(table.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(table.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(table.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(table.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new table().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton btnAdd;
private javax.swing.JButton btnDelete;
private javax.swing.JButton btnEdit;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable tbltable;
private javax.swing.JTextField txtCol1;
private javax.swing.JTextField txtCol2;
private javax.swing.JTextField txtCol3;
// End of variables declaration
}
以下是展示我的问题的图片。
2 个答案:
答案 0 :(得分：1)
我建议您在TableModel中保留一个包含布尔值的列，以指示该行是否已删除。此列不应显示在JTable中。您可以使用以下命令将其从JTable视图中删除：
table.removeColumn( table.getColumn(...) );
然后您可以查看Table Row Rendering，其中显示了如何根据行中的值呈现行。
当您测试需要使用的行的布尔值时，请不要忘记：
table.getModel().getValueAt(...);
因为该表无法访问该值，因为它未显示在表中。
答案 1 :(得分：0)
首先看看Using Custom Renderers和Concepts: Editors and Renderers
重要的是，表中的每个单元格都使用相同的TableCellRenderer进行渲染（至少在您的情况下，如果您有不同的数据类型，它会更复杂），这意味着{ {1}}是无状态的，它的上下文通过TableCellRenderer
每次调用getTableCellRendererComponent时，您都需要更新每个单元格的状态
您需要以某种方式确定是否删除该行，并在具体情况下呈现状态。
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