getclassname.html
来自「java类库详细讲解」· HTML 代码 · 共 210 行
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<TITLE>Getting the Name of a Class Object
(Java Developers Almanac Example)
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<h3>
e60.
Getting the Name of a Class Object</h3>
<pre>
// Get the fully-qualified name of a class
Class cls = <font color="#0066ff"><i>java.lang.String.class</i></font>;
String name = cls.getName(); // java.lang.String
// Get the fully-qualified name of a inner class
cls = <font color="#0066ff"><i>java.util.Map.Entry.class</i></font>;
name = cls.getName(); // java.util.Map$Entry
// Get the unqualified name of a class
cls = <font color="#0066ff"><i>java.util.Map.Entry.class</i></font>;
name = cls.getName();
if (name.lastIndexOf('.') > 0) {
name = name.substring(name.lastIndexOf('.')+1); // Map$Entry
}
// The $ can be converted to a .
name = name.replace('$', '.'); // Map.Entry
// Get the name of a primitive type
name = <font color="#0066ff"><i>int.class</i></font>.getName(); // int
// Get the name of an array
name = <font color="#0066ff"><i>boolean[].class</i></font>.getName(); // [Z
name = <font color="#0066ff"><i>byte[].class</i></font>.getName(); // [B
name = <font color="#0066ff"><i>char[].class</i></font>.getName(); // [C
name = <font color="#0066ff"><i>short[].class</i></font>.getName(); // [S
name = <font color="#0066ff"><i>int[].class</i></font>.getName(); // [I
name = <font color="#0066ff"><i>long[].class</i></font>.getName(); // [J
name = <font color="#0066ff"><i>float[].class</i></font>.getName(); // [F
name = <font color="#0066ff"><i>double[].class</i></font>.getName(); // [D
name = <font color="#0066ff"><i>String[].class</i></font>.getName(); // [Ljava.lang.String;
name = <font color="#0066ff"><i>int[][].class</i></font>.getName(); // [[I
// Get the name of void
cls = Void.TYPE;
name = cls.getName(); // void
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Related Examples
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e59. <a class="eglink" href="GetClass.html?l=rel">
Getting a Class Object
</a>
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e61. <a class="eglink" href="IsClass.html?l=rel">
Determining If a Class Object Represents a Class or Interface
</a>
<br>
e62. <a class="eglink" href="SuperClass.html?l=rel">
Getting the Superclass of an Object
</a>
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e63. <a class="eglink" href="SuperClass2.html?l=rel">
Getting the Superclass of a Class Object
</a>
<br>
e64. <a class="eglink" href="GetImplements2.html?l=rel">
Listing the Interfaces That a Class Implements
</a>
<br>
e65. <a class="eglink" href="GetImplements.html?l=rel">
Listing the Interfaces That an Interface Extends
</a>
<br>
e66. <a class="eglink" href="GetPkg.html?l=rel">
Getting the Package of a Class
</a>
<br>
e67. <a class="eglink" href="ClassOrigin.html?l=rel">
Determining from Where a Class Was Loaded
</a>
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e68. <a class="eglink" href="LoadClass.html?l=rel">
Loading a Class That Is Not on the Classpath
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e69. <a class="eglink" href="ReloadClass.html?l=rel">
Dynamically Reloading a Modified Class
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See also:
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Arrays">
Arrays
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Assertions">
Assertions
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Commands">
Commands
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Numbers">
Numbers
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Objects">
Objects
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Strings">
Strings
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#System%20Properties">
System Properties
</a>
<a class="eglink" href="/egs/java.lang/pkg.html?l=rel#Threads">
Threads
</a>
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