在用java/224771.html">javaSwing写界面时，想实现JLabel中的文本内容自动换行，网上查了一下，大多是一些比较简单的加个换行而已，于是自己写了一个函数，现在贴出了供大家学习。
效果图如下：
代码如下：
package com.zht;import java.awt.BorderLayout;import java.awt.Dimension;import java.awt.FlowLayout;import java.awt.FontMetrics;import java.util.concurrent.TimeUnit;import javax.swing.JFrame;import javax.swing.JLabel;public class JLabelDemo extends JFrame { public static void main(String[] args) throws InterruptedException { System.out.println("hello"); JLabelDemo jLabelDemo = new JLabelDemo(); } public JLabelDemo() throws InterruptedException { String text = "This space contains technical articles," + " blogs and discussion forums with questions and answers." + "作为一个Java程序员，从论坛上感受到使用Java开发程序的人越来多，" + "心中不免欣慰。hello"; JLabel label = new JLabel(); label.setSize(200, 0); //注意JLabel一定要设置宽度 // System.out.println(label.getWidth()); JlabelSetText(label, text); setLayout(new FlowLayout()); add(label); pack(); // setSize(300, 200); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLocationRelativeTo(null); setVisible(true); } void JlabelSetText(JLabel jLabel, String longString) throws InterruptedException { StringBuilder builder = new StringBuilder("<html>"); char[] chars = longString.toCharArray(); FontMetrics fontMetrics = jLabel.getFontMetrics(jLabel.getFont()); int start = 0; int len = 0; while (start + len < longString.length()) { while (true) { len++; if (start + len > longString.length())break; if (fontMetrics.charsWidth(chars, start, len) > jLabel.getWidth()) { break; } } builder.append(chars, start, len-1).append("<br/>"); start = start + len - 1; len = 0; } builder.append(chars, start, longString.length()-start); builder.append("</html>"); jLabel.setText(builder.toString()); }}总结
以上就是本文关于Jlabel实现内容自动换行简单实例的全部内容，希望对大家有所帮助。
新闻热点
疑难解答
图片精选
