java.lang

Class Compiler

java.lang.Object

java.lang.Compiler

public final class Compiler
extends Object

The Compiler class is a placeholder for a JIT compiler implementation, and does nothing unless there is such a compiler.

The system property java.compiler may contain the name of a library to load with System.loadLibrary when the virtual machine first starts. If so, and loading the library succeeds, then a function by the name of java_lang_Compiler_start() in that library is called.

Note that a VM might not have implemented any of this.

Since:

JDK 1.0

See Also:

System.getProperty(String), System.getProperty(String, String), System.loadLibrary(String)

Method Summary

Methods

Modifier and Type	Method and Description
static Object	command(Object arg) This method examines the argument and performs an operation according to the compilers documentation.
static boolean	compileClass(Class<?> oneClass) Compile the class named by oneClass.
static boolean	compileClasses(String classNames) Compile the classes whose name matches classNames.
static void	disable() Calling Compiler.disable() will cause the compiler to be suspended; provided that a compiler even exists.
static void	enable() Calling Compiler.enable() will cause the compiler to resume operation if it was previously disabled; provided that a compiler even exists.

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<?> oneClass)

Compile the class named by oneClass.

Parameters:

oneClass - the class to compile

Returns:

false if no compiler is available or compilation failed, true if compilation succeeded

Throws:

NullPointerException - if oneClass is null

compileClasses

public static boolean compileClasses(String classNames)

Compile the classes whose name matches classNames.

Parameters:

classNames - the name of classes to compile

Returns:

false if no compiler is available or compilation failed, true if compilation succeeded

Throws:

NullPointerException - if classNames is null

command

public static Object command(Object arg)

This method examines the argument and performs an operation according to the compilers documentation. No specific operation is required.

Parameters:

arg - a compiler-specific argument

Returns:

a compiler-specific value, including null

Throws:

NullPointerException - if the compiler doesn't like a null arg

enable

public static void enable()

Calling Compiler.enable() will cause the compiler to resume operation if it was previously disabled; provided that a compiler even exists.

disable

public static void disable()

Calling Compiler.disable() will cause the compiler to be suspended; provided that a compiler even exists.