在用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:
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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());
}
}
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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。如有不足之处,欢迎留言指出。感谢朋友们对本站的支持!
原文链接:http://blog.csdn.net/zhhtao89/article/details/50179695