java jTable CustomRenderer背景颜色仅在我单击它时更改..为什么会发生这种情况
我是java新手,我使用netbean创建java应用程序。我创建了javatable(tb1是变量名)…我添加了2行和2列。我有1个按钮。我想做的一切都是 当我点击一个按钮时,改变表格第一列的背景颜色..它可以工作..但问题是改变颜色我必须点击表格..然后我点击表格背景颜色变化的任何地方..我不知道问题出在哪里..这是我的代码有帮助吗java jTable CustomRenderer背景颜色仅在我单击它时更改..为什么会发生这种情况,java,swing,netbeans,jtable,tablecellrenderer,Java,Swing,Netbeans,Jtable,Tablecellrenderer,我是java新手,我使用netbean创建java应用程序。我创建了javatable(tb1是变量名)…我添加了2行和2列。我有1个按钮。我想做的一切都是 当我点击一个按钮时,改变表格第一列的背景颜色..它可以工作..但问题是改变颜色我必须点击表格..然后我点击表格背景颜色变化的任何地方..我不知道问题出在哪里..这是我的代码有帮助吗 /* * To change this template, choose Tools | Templates * and open the template
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package javaapplication57;
import java.awt.Color;
import java.awt.Component;
import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableColumn;
/**
*
* @author Madhawa
*/
public class NewJFrame extends javax.swing.JFrame {
/**
* Creates new form NewJFrame
*/
public NewJFrame() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jButton1 = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
tb1 = new javax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("colorize");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
tb1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
{"madhawa", "123"},
{"sonic", "234"}
},
new String [] {
"name", "password"
}
) {
Class[] types = new Class [] {
java.lang.String.class, java.lang.String.class
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
});
jScrollPane1.setViewportView(tb1);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(18, 18, 18)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 403, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(18, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jButton1, javax.swing.GroupLayout.PREFERRED_SIZE, 215, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(108, 108, 108))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(25, 25, 25)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 107, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)
.addComponent(jButton1)
.addContainerGap(37, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
TableColumn col = tb1.getColumnModel().getColumn(0);
DefaultTableModel model3 = (DefaultTableModel)tb1.getModel();
col.setCellRenderer(new CustomRenderer());
}
/**
* @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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.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 NewJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton jButton1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable tb1;
// End of variables declaration
}
class CustomRenderer extends DefaultTableCellRenderer
{
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column)
{
Component c = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column);
setForeground(Color.red);
setBackground(Color.YELLOW);
return c;
}
}
/*
*要更改此模板,请选择工具|模板
*然后在编辑器中打开模板。
*/
包javaapplication57;
导入java.awt.Color;
导入java.awt.Component;
导入javax.swing.JTable;
导入javax.swing.table.DefaultTableCellRenderer;
导入javax.swing.table.DefaultTableModel;
导入javax.swing.table.TableColumn;
/**
*
*@作者Madhawa
*/
公共类NewJFrame扩展了javax.swing.JFrame{
/**
*创建新表单NewJFrame
*/
公共NewJFrame(){
初始化组件();
}
/**
*从构造函数中调用此方法来初始化表单。
*警告:不要修改此代码。此方法的内容始终为
*由表单编辑器重新生成。
*/
@抑制警告(“未选中”)
//
私有组件(){
jButton1=newjavax.swing.JButton();
jScrollPane1=newjavax.swing.JScrollPane();
tb1=newjavax.swing.JTable();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText(“着色”);
jButton1.addActionListener(新java.awt.event.ActionListener(){
public void actionPerformed(java.awt.event.ActionEvent evt){
jButton1ActionPerformed(evt);
}
});
tb1.setModel(新的javax.swing.table.DefaultTableModel(
新对象[][]{
{“madhawa”,“123”},
{“sonic”,“234”}
},
新字符串[]{
“名称”、“密码”
}
) {
类[]类型=新类[]{
java.lang.String.class,java.lang.String.class
};
公共类getColumnClass(int columnIndex){
返回类型[列索引];
}
});
jScrollPane1.setViewportView(tb1);
javax.swing.GroupLayout=newjavax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(布局);
layout.setHorizontalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(18,18,18)
.addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED\u SIZE,403,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addContainerGap(18,简称最大值))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT\u SIZE,Short.MAX\u值)
.addComponent(jButton1,javax.swing.GroupLayout.PREFERRED_SIZE,215,javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(108、108、108))
);
layout.setVerticalGroup(
createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup()
.addGap(25,25,25)
.addComponent(jScrollPane1,javax.swing.GroupLayout.PREFERRED\u SIZE,107,javax.swing.GroupLayout.PREFERRED\u SIZE)
.addGap(18,18,18)
.addComponent(jButton1)
.addContainerGap(37,简称最大值))
);
包装();
}//
私有void jButton1ActionPerformed(java.awt.event.ActionEvent evt){
//TODO在此处添加您的处理代码:
TableColumn col=tb1.getColumnModel().getColumn(0);
DefaultTableModel3=(DefaultTableModel)tb1.getModel();
col.setCellRenderer(新的CustomRenderer());
}
/**
*@param指定命令行参数
*/
公共静态void main(字符串参数[]){
/*设置Nimbus的外观和感觉*/
//
/*如果Nimbus(在JavaSE6中引入)不可用,请使用默认的外观。
*详情请参阅http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
试一试{
for(javax.swing.UIManager.LookAndFeelInfo:javax.swing.UIManager.getInstalledLookAndFeels()){
if(“Nimbus”.equals(info.getName())){
setLookAndFeel(info.getClassName());
打破
}
}
}捕获(ClassNotFoundException ex){
getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(实例化异常){
getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}捕获(非法访问例外){
getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}catch(javax.swing.UnsupportedLookAndFeelException ex){
getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);
}
//
/*创建并显示表单*/
invokeLater(new Runnable()){
公开募捐{
新建NewJFrame().setVisible(true);
}
});
}
//变量声明-不修改
私有javax.swing.JButton jButton1;
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
TableColumn col = tb1.getColumnModel().getColumn(0);
DefaultTableModel model3 = (DefaultTableModel) tb1.getModel();
col.setCellRenderer(new CustomRenderer());
tb1.repaint();
}