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java.lang
Class Compiler

java.lang.Object
  java.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 System.getProperty(String) and System.getProperty(String, String). If so, it is assumed to be the name of a library (with a platform-dependent exact location and type); System.loadLibrary(java.lang.String) 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

Method Summary

Modifier and Type	Method and Description
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 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 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 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 void enable()

Cause the Compiler to resume operation.

disable

public static void disable()

Cause the Compiler to cease operation.