JTABLE中如何让数字右对齐？

为了便于比较查看数字的大小，JTABLE中如何让数字右对齐？
同时小弟也想知道怎样让文本居中对齐？

7 个解决方案

#1

ding

#2

mark

#3

写一个类继承 javax.swing.table.DefaultTAbleCellRenderer

public class XxxRenderer extends DefaultTableCellRenderer {

        public XxxRenderer (){
            super();
            setHorizentalAlignment(javax.swing.SwingConstants.RIGHT);
        }

        public void setValue(Object value){
           //这里格式化你的数据
           super.setValue(value);
        }

}

.......

然后 table.setDefaultRenderer(Float.class,new XxxRenderer ());

#4

好像不关用啊
还有别的什么要求吗
比如说对Jtable的构造方式了。

#5

http://community.csdn.net/Expert/TopicView.asp?id=4407145

#6

谢了楼上的各位。但小弟还是没有实现。请各位帮我看看是怎么回事
package java试验1;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.*;
import java.awt.*;
import javax.swing.table.DefaultTableModel;

public class JtableFrame extends JFrame {
  BorderLayout borderLayout1 = new BorderLayout();
  JTable jTable1 = new JTable();
  DefaultTableModel dm=new DefaultTableModel();
  String[] columname={"aa","bb","cc"};
  Object [][] data={{"11","22"},{"33","44"}};
  public JtableFrame() {
    try {
      jbInit();
    }
    catch(Exception ex) {
      ex.printStackTrace();
    }
  }

  void jbInit() throws Exception {
    jTable1.setDefaultRenderer(Float.class,new Test ());
    dm = new DefaultTableModel(data, columname);
    dm.setValueAt("111", 1, 1);
    jTable1 = new JTable(dm);
    jTable1.setEnabled(true);
    jTable1.editCellAt(1, 1);
    System.out.println(jTable1.getTableHeader());
    System.out.println(jTable1.getValueAt(1, 1));
    // jTable1.setDefaultRenderer(Float.class,new NumberRenderer ());//为什么不其作用呢？
    jTable1.setDefaultRenderer(Float.class,new Test());//为什么不其作用呢？
    this.setBounds(100,100,400,400);
    this.getContentPane().setLayout(borderLayout1);
    this.getContentPane().add(jTable1, BorderLayout.CENTER);

  }

  public static void main(String[] args) {
    JtableFrame jtable = new JtableFrame();
    jtable.setVisible(true);
  }
}
class Test extends DefaultTableCellRenderer{

    /* (non-Javadoc)
     * @see javax.swing.table.TableCellRenderer#getTableCellRendererComponent(javax.swing.JTable, java.lang.Object, boolean, boolean, int, int)
     */
    public Component getTableCellRendererComponent(JTable table,
            Object value,
            boolean isSelected,
            boolean hasFocus,
            int row,
            int column) {
       JLabel label = (JLabel)super.getTableCellRendererComponent(table,value,isSelected,hasFocus,row,column);
       if (value instanceof Integer){
         label.setHorizontalAlignment(SwingConstants.RIGHT);
       }else{
         setHorizontalAlignment(SwingConstants.CENTER);
       }
       return label;
    }

}

class NumberRenderer extends DefaultTableCellRenderer {

        public NumberRenderer (){
            super();
            setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);
         }

        public void setValue(Object value){
           //这里格式化你的数据
           super.setValue("666");
        }

}

#7

jTable1.setDefaultRenderer(Float.class,new Test ());
dm = new DefaultTableModel(data, columname);
dm.setValueAt("111", 1, 1);
jTable1 = new JTable(dm);

=======================================================
这段代码有问题。
jTable1.setDefaultRenderer(Float.class,new Test ());
放到jTable1 = new JTable(dm);后面

而且：如果你要使用Float.class，下面的
Object [][] data={{"11","22"},{"33","44"}};也不对。
Object [][] data={{Float.valueof("11"),Float.valueof("11")}};
而render里头的instanceof Integer应该改成instanceof Float

#1