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Compiler.javaAPI DocJava SE 6 API3931Tue Jun 10 00:25:36 BST 2008java.lang

Compiler

public final class Compiler extends Object
The Compiler class is provided to support Java-to-native-code compilers and related services. By design, the Compiler class does nothing; it serves as a placeholder for a JIT compiler implementation.

When the Java Virtual Machine first starts, it determines if the system property java.compiler exists. (System properties are accessible through getProperty, a method defined by the System class.) If so, it is assumed to be the name of a library (with a platform-dependent exact location and type); the loadLibrary method in class System is called to load that library. If this loading succeeds, the function named java_lang_Compiler_start() in that library is called.

If no compiler is available, these methods do nothing.

author
Frank Yellin
version
1.22, 11/17/05
see
java.lang.System#getProperty(java.lang.String)
see
java.lang.System#getProperty(java.lang.String, java.lang.String)
see
java.lang.System#loadLibrary(java.lang.String)
since
JDK1.0

Fields Summary
Constructors Summary
private Compiler()

Methods Summary
public static native java.lang.Objectcommand(java.lang.Object any)
Examines the argument type and its fields and perform some documented operation. No specific operations are required.

param
any an argument.
return
a compiler-specific value, or null if no compiler is available.
exception
NullPointerException if any is null.

public static native booleancompileClass(java.lang.Class clazz)
Compiles the specified class.

param
clazz a class.
return
true if the compilation succeeded; false if the compilation failed or no compiler is available.
exception
NullPointerException if clazz is null.

public static native booleancompileClasses(java.lang.String string)
Compiles all classes whose name matches the specified string.

param
string the name of the classes to compile.
return
true if the compilation succeeded; false if the compilation failed or no compiler is available.
exception
NullPointerException if string is null.

public static native voiddisable()
Cause the Compiler to cease operation.

public static native voidenable()
Cause the Compiler to resume operation.

private static native voidinitialize()

private static native voidregisterNatives()