edittextarea.html

来自「java类库详细讲解」· HTML 代码 · 共 106 行

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<TITLE>Modifying Text in a JTextArea Component
(Java Developers Almanac Example)
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<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
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<H1>The Java Developers Almanac 1.4</H1>
    Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
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<h3>
    e896.  
    Modifying Text in a JTextArea Component</h3>




<pre>
    // Create the text area
    JTextArea ta = new JTextArea(<font color="#0066ff"><i>"Initial Text"</i></font>);
    
    // Insert some text at the beginning
    int pos = 0;
    ta.insert(<font color="#0066ff"><i>"some text"</i></font>, pos);
    
    // Insert some text after the 5th character
    pos = 5;
    ta.insert(<font color="#0066ff"><i>"some text"</i></font>, pos);
    
    // Append some text
    ta.append(<font color="#0066ff"><i>"some text"</i></font>);
    
    // Replace the first 3 characters with some text
    int start = 0;
    int end = 3;
    ta.replaceRange(<font color="#0066ff"><i>"new text"</i></font>, start, end);
    
    // Delete the first 5 characters
    start = 0;
    end = 5;
    ta.replaceRange(null, start, end);
    
    
</pre>

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&nbsp;&nbsp;&nbsp;&nbsp;(e.g. "cache", "parse xml dom", "java.lang.String", "java.lang.String.substring", "String.substring", "substring")
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