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    <p>If you are not afraid of extending swing tool tip, you can create your own JMultiLineToolTip:</p> <ol> <li>Extend JTooltip In the extended Tool tip component implementation,</li> <li>set a custom tool tip UI In customUI implementation</li> <li>Implement<code>paint()</code> method to write given string in multi line</li> </ol> <p><a href="http://www.java2s.com/Code/Java/Swing-JFC/MultiLineToolTipExample.htm" rel="noreferrer">Here is an example</a> - it shows how to use it as well</p> <p>However, to answer your questions:</p> <ol> <li><p>Which JMultiLineToolTip is a good one to use?</p> <p>Use <code>&lt;html&gt;</code></p></li> <li><p>How can I use such a class to represent all of the tooltips in my application?</p> <p>Per compopnent, it is easy but tedious to achieve as you will have to override <a href="http://docs.oracle.com/javase/1.5.0/docs/api/javax/swing/JComponent.html#createToolTip%28%29" rel="noreferrer">creatreToolTip()</a> API. But if you want to change it globally, you may:</p> <p>(i)Simple way - Register your custom tooltip UI with the <code>UIManager</code> at the beginning of your execution.</p> <p><code>UIManager.put( "ToolTipUI", "SeNormToolTipUI" );</code></p> <p><code>UIManager.put( "SeNormToolTipUI",Class.forName( multiLineToolTipUIClassName ) );</code></p> <p>(ii) complex way</p> <p>You will have to start implementing your own look and feel. In the look and feel implementation, you would provide defaults for <code>ToolTipUI</code> as your UI implementation and then set that look and feel to the application you are running. For instance take a look at the <a href="http://www.koders.com/java/fid555169BAAFFA92F84223B548C83D4655041815E3.aspx?s=204#L884" rel="noreferrer">MetalLookAndFeel implementation</a>. You may just extend that part and implement your on lnf.</p></li> </ol> <p>So, it is better to use <code>&lt;html&gt;</code></p>
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    1. POMake all tooltips multiline in Java (Swing)
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    1. COwhy so complex?
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    2. COI did not mean complex=difficult. I mean rather it is un-necessary.
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    3. COthanks! works like charm!
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