Class Compiler
java.lang
java.lang.Object
  java.lang.Compiler

final public 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.

Since:
JDK1.0
Version:
1.22, 11/17/05
Author:
Frank Yellin
See Also:
System.getProperty(java.lang.String), System.getProperty(java.lang.String, java.lang.String), System.loadLibrary(java.lang.String)

Method Summary
static Object
command(Object any)
Examines the argument type and its fields and perform some documented operation.
static boolean
compileClass(Class<?> clazz)
Compiles the specified class.
static boolean
compileClasses(String string)
Compiles all classes whose name matches the specified string.
static void
disable()
Cause the Compiler to cease operation.
static void
enable()
Cause the Compiler to resume operation.
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Method Detail
compileClass
public static native boolean compileClass(Class<?> clazz)
Compiles the specified class.
Parameters:
clazz - a class.
Returns:
true if the compilation succeeded; false if the compilation failed or no compiler is available.
Throws:
NullPointerException - if clazz is null.

compileClasses
public static native boolean compileClasses(String string)
Compiles all classes whose name matches the specified string.
Parameters:
string - the name of the classes to compile.
Returns:
true if the compilation succeeded; false if the compilation failed or no compiler is available.
Throws:
NullPointerException - if string is null.

command
public static native Object command(Object any)
Examines the argument type and its fields and perform some documented operation. No specific operations are required.
Parameters:
any - an argument.
Returns:
a compiler-specific value, or null if no compiler is available.
Throws:
NullPointerException - if any is null.

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

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