如何使Jtable单元格字符长度 [英] How to make Jtable cell character length
本文介绍了如何使Jtable单元格字符长度的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想让我的j表列限制字符,例如只允许16个字符.我尝试了各种方法,但没有用.有人可以帮助我吗?
I want to make my j table column to limit character like allowed only 16 character.I tried various methods nothing works.can anybody helps me?.
推荐答案
在此处找到答案 https://community.oracle.com/thread/1482301
自定义单元格编辑器 http://java.sun.com/docs/books /tutorial/uiswing/components/table.html#validtext 和JTextField上的自定义文档
"Custom Cell Editors http://java.sun.com/docs/books/tutorial/uiswing/components/table.html#validtext and a custom document on a JTextField
一个价值一千个单词的示例"
One example worth thousand words"
import java.awt.*;
import javax.swing.*;
public class Test2 extends JFrame {
public Test2() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Container content = getContentPane();
String[] head = {"One","Two","Three"};
String[][] data = {{"R1-C1", "12345678", "R1-C3"},
{"R2-C1", "R2-C2", "R2-C3"},
{"R3-C1", "R3-C2", "R3-C3"}};
JTable jt = new JTable(data, head);
content.add(new JScrollPane(jt), BorderLayout.CENTER);
JTextField jtf = new JTextField();
jtf.setDocument(new LimitedPlainDocument(10));
jt.getColumnModel().getColumn(1).setCellEditor(new DefaultCellEditor(jtf));
setSize(300,300);
}
public static void main(String[] args) { new Test2().setVisible(true); }
}
class LimitedPlainDocument extends javax.swing.text.PlainDocument {
private int maxLen = -1;
/** Creates a new instance of LimitedPlainDocument */
public LimitedPlainDocument() {}
public LimitedPlainDocument(int maxLen) { this.maxLen = maxLen; }
public void insertString(int param, String str,
javax.swing.text.AttributeSet attributeSet)
throws javax.swing.text.BadLocationException {
if (str != null && maxLen > 0 && this.getLength() + str.length() > maxLen) {
java.awt.Toolkit.getDefaultToolkit().beep();
return;
}
super.insertString(param, str, attributeSet);
}
}
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