Package Summary Overview Summary

class:Compiler [CHANGED]

Deprecated, for removal: This API element is subject to removal in a future version.
JIT compilers and their technologies vary too widely to be controlled effectively by a standardized interface. As such, many JIT compiler implementations ignore this interface, and are instead controllable by implementation-specific mechanisms such as command-line options. This class is subject to removal in a future version of Java SE.
```
@Deprecated(since="9",
            forRemoval=true)
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. Ifno compiler is available, these methods do nothing.

Since:

JDK11.0

```
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

Deprecated, for removal: This API element is subject to removal in a future version.
JIT compilers and their technologies vary too widely to be controlled effectively by a standardized interface. As such, many JIT compiler implementations ignore this interface, and are instead controllable by implementation-specific mechanisms such as command-line options. This class is subject to removal in a future version of Java SE.
```
@Deprecated(since="9",
            forRemoval=true)
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. If no compiler is available, these methods do nothing.

Since:

1.0

method:compileClass(java.lang.Class) [CHANGED]

compileClass public static boolean compileClass(Class<?> clazz) Deprecated, for removal: This API element is subject to removal in a future version. 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`
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`	compileClass public static boolean compileClass(Class<?> clazz) Deprecated, for removal: This API element is subject to removal in a future version. 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`

method:compileClasses(java.lang.String) [CHANGED]

compileClasses
```
public static boolean compileClasses(String string)
```
Deprecated, for removal: This API element is subject to removal in a future version.

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

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

compileClasses
```
public static boolean compileClasses(String string)
```
Deprecated, for removal: This API element is subject to removal in a future version.

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

method:command(java.lang.Object) [CHANGED]

command
```
public static Object command(Object any)
```
Deprecated, for removal: This API element is subject to removal in a future version.

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

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

command
```
public static Object command(Object any)
```
Deprecated, for removal: This API element is subject to removal in a future version.

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

method:enable() [CHANGED]

enable public static void enable() Deprecated, for removal: This API element is subject to removal in a future version. Cause the Compiler to resume operation.
enable public static void enable() Cause the Compiler to resume operation.	enable public static void enable() Deprecated, for removal: This API element is subject to removal in a future version. Cause the Compiler to resume operation.

method:disable() [CHANGED]

disable public static void disable() Deprecated, for removal: This API element is subject to removal in a future version. Cause the Compiler to cease operation.
disable public static void disable() Cause the Compiler to cease operation.	disable public static void disable() Deprecated, for removal: This API element is subject to removal in a future version. Cause the Compiler to cease operation.

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