在JTextArea中的列中对齐字符串
Sub*_*ash 7 java swing jtextarea
我想在JTextArea中打印字符串并正确对齐它们.很难解释所以我会上传我想要实现的屏幕截图.
因此,每行打印的字符串都是从Paper对象打印出来的,该对象具有参数(id,title,author,date,rank).数据从文本文件中读取,并使用loadPaper()函数存储在LinkedList中.
然后displayPapers()函数用于向JTextArea显示Paper对象的内容.displayPapers()如下所示:
/** Print all Paper object present in the LinkedList paperList to textArea */
public void displayPapers(){
// clear textArea before displaying new content
displayTxtArea.setText("");
Paper currentPaper;
ListIterator<Paper> iter = paperList.listIterator();
while(iter.hasNext()){
currentPaper = iter.next();
String line = currentPaper.toString();
if("".equals(line)){
continue;
} // end if
String[] words = line.split(",");
displayTxtArea.append (" "
+ padString(words[0],30)
+ padString(words[1],30)
+ " "
+ padString(words[2],30)
+ " "
+ padString(words[3],30)
+ padString(words[4],30)
+ "\n");
System.out.println(words);
//displayTxtArea.append(currentPaper.toString());
} // end while
displayTxtArea.append(" Total " + noOfPapers + " entries!");
} // end showAllPaper
padString()函数为String添加空格,以便它们都具有相同数量的单词.PadString()如下所示:
/** Add spaces to Strings so that all of the are of same number of characters
* @param str String to be padded
* @param n total number words String should be padded to
* @return str Padded string
*/
private String padString(String str, int n){
if(str.length() < n){
for(int j = str.length(); j < n; j++){
str += " ";
} // end for
} // end if
return str;
} // end padString
我已经研究了一段时间,但仍然无法得到解决方案.正如您可以注意到上面的图片并非所有内容都按预期完全对齐.
如何将它们完美对齐以使其看起来更好？谢谢.
仅当您使用单倍间距字体时,输出才会在JTextArea中"正确"对齐.例如,"Andale Mono 14"就可以解决这个问题.
此外,为了让您的生活更轻松并避免填充地狱,请使用String.format及其语法.
String format = "%1$5s %2$-40s %3$-20s";
String someLine;
while (whatEver...) {
...
someLine = String.format(format, aNum, aName, aDate);
jTextArea1.append(someLine + "\n");
}
您可以将HTML与swing组件一起使用或使用JEditorPane.
JLabel jt=new JLabel();
jt.setText("<html>
<table border='1'>
<tr><th>No</th><th>Name</th></tr>
<tr><td>1</td><td>Mr.A</td></tr></table></html>");