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<h2 title="Interface Builder" class="title">Interface Builder<T></h2>
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<dt><span class="paramLabel">Type Parameters:</span></dt>
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<dd><code><a href="../../../../../org/apache/commons/lang3/concurrent/BasicThreadFactory.Builder.html" title="class in org.apache.commons.lang3.concurrent">BasicThreadFactory.Builder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/builder/CompareToBuilder.html" title="class in org.apache.commons.lang3.builder">CompareToBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/builder/DiffBuilder.html" title="class in org.apache.commons.lang3.builder">DiffBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/builder/EqualsBuilder.html" title="class in org.apache.commons.lang3.builder">EqualsBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/builder/HashCodeBuilder.html" title="class in org.apache.commons.lang3.builder">HashCodeBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/builder/ReflectionToStringBuilder.html" title="class in org.apache.commons.lang3.builder">ReflectionToStringBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/text/StrBuilder.html" title="class in org.apache.commons.lang3.text">StrBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/builder/ToStringBuilder.html" title="class in org.apache.commons.lang3.builder">ToStringBuilder</a></code>, <code><a href="../../../../../org/apache/commons/lang3/reflect/TypeUtils.WildcardTypeBuilder.html" title="class in org.apache.commons.lang3.reflect">TypeUtils.WildcardTypeBuilder</a></code></dd>
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<pre>public interface <span class="typeNameLabel">Builder<T></span></pre>
<div class="block"><p>
The Builder interface is designed to designate a class as a <em>builder</em>
object in the Builder design pattern. Builders are capable of creating and
configuring objects or results that normally take multiple steps to construct
or are very complex to derive.
</p>
<p>
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classes must implement. The result of this method should be the final
configured object or result after all building operations are performed.
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It is a recommended practice that the methods supplied to configure the
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method calls can be chained together.
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Example Builder:
<pre><code>
class FontBuilder implements Builder<Font> {
private Font font;
public FontBuilder(String fontName) {
this.font = new Font(fontName, Font.PLAIN, 12);
}
public FontBuilder bold() {
this.font = this.font.deriveFont(Font.BOLD);
return this; // Reference returned so calls can be chained
}
public FontBuilder size(float pointSize) {
this.font = this.font.deriveFont(pointSize);
return this; // Reference returned so calls can be chained
}
// Other Font construction methods
public Font build() {
return this.font;
}
}
</code></pre>
Example Builder Usage:
<pre><code>
Font bold14ptSansSerifFont = new FontBuilder(Font.SANS_SERIF).bold()
.size(14.0f)
.build();
</code></pre></div>
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<pre><a href="../../../../../org/apache/commons/lang3/builder/Builder.html" title="type parameter in Builder">T</a> build()</pre>
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