Compiler

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

Methods

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.