jtable中如何设置每一列所能输入的最大字符数?

Question

如题

Answer 1

重写tablemodel的setValueAt方法可以做到的

Answer 2

package cn.com.s1t62.wufangdong;import java.awt.*;import javax.swing.*;
import java.awt.Rectangle;
import javax.swing.table.DefaultTableModel;
public class Frame1 extends JFrame {
    JPanel contentPane;
    Object[][] object = { {"123", "asfd", "asdfa", "dfawe"}, {"123",
                        "asfd", ";lkoi", "faawe"}, {"123", "asfd",
                        "asdfa", "faswe"}, {"123", "6we56", "asda",
                        "qadf1"}
    };
    
    String[] name={"A","B","C","D"};
    JTable jTable1 = new JTable(new DefaultTableModel(object,name){
        public void setValueAt(Object aValue, int rowIndex, int columnIndex) 
        {
            String str=aValue.toString();
            if (str.length()>6)
            {
                javax.swing.JOptionPane.showMessageDialog(null,"不能输入大于6位的字符串!");
                return;
            }
            
            super.setValueAt(aValue,rowIndex,columnIndex);
        }
    });
    public Frame1() {
        try {
            setDefaultCloseOperation(EXIT_ON_CLOSE);
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }    /**
     * Component initialization.
     *
     * @throws java.lang.Exception
     */
    private void jbInit() throws Exception {
        contentPane = (JPanel) getContentPane();
        contentPane.setLayout(null);
        setSize(new Dimension(400, 300));
        setTitle("Frame Title");
        jTable1.setBounds(new Rectangle(36, 37, 291, 214));
        contentPane.add(jTable1);
    }
}