ClassFileVersion (Byte Buddy (without dependencies) 1.4.21 API)

java.lang.Object
- net.bytebuddy.ClassFileVersion

All Implemented Interfaces:

Comparable<ClassFileVersion>
```
public class ClassFileVersion
extends Object
implements Comparable<ClassFileVersion>
```
A wrapper object for representing a validated class file version in the format that is specified by the JVMS.

Nested Class Summary

Nested Classes
Modifier and Type	Class and Description
`protected static class`	`ClassFileVersion.VersionExtractor` A simple visitor that extracts the class file version of a class file.
`protected static interface`	`ClassFileVersion.VersionLocator` A locator for the executing VM's Java version.

Field Summary

Fields
Modifier and Type	Field and Description
`protected static int`	`BASE_VERSION` Returns the minimal version number that is legal.
`static ClassFileVersion`	`JAVA_V1` The class file version of Java 1.
`static ClassFileVersion`	`JAVA_V2` The class file version of Java 2.
`static ClassFileVersion`	`JAVA_V3` The class file version of Java 3.
`static ClassFileVersion`	`JAVA_V4` The class file version of Java 4.
`static ClassFileVersion`	`JAVA_V5` The class file version of Java 5.
`static ClassFileVersion`	`JAVA_V6` The class file version of Java 6.
`static ClassFileVersion`	`JAVA_V7` The class file version of Java 7.
`static ClassFileVersion`	`JAVA_V8` The class file version of Java 8.
`static ClassFileVersion`	`JAVA_V9` The class file version of Java 9.

Constructor Summary

Constructors
Modifier Constructor and Description

protected ClassFileVersion(int versionNumber)
Creates a wrapper for a given minor-major release of the Java class file file.

Constructors
Modifier	Constructor and Description
`protected`	`ClassFileVersion(int versionNumber)` Creates a wrapper for a given minor-major release of the Java class file file.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`compareTo(ClassFileVersion other)`
`boolean`	`equals(Object other)`
`int`	`getJavaVersion()` Returns the Java runtime version number of this class file version.
`int`	`getMajorVersion()` Returns the major version this instance represents.
`int`	`getMinorMajorVersion()` Returns the minor-major release number of this class file version.
`int`	`getMinorVersion()` Returns the minor version this instance represents.
`int`	`hashCode()`
`boolean`	`isAtLeast(ClassFileVersion classFileVersion)` Checks if this class file version is at least of the provided version.
`boolean`	`isLessThan(ClassFileVersion classFileVersion)` Checks if this class file version is less than the provided version.
`static ClassFileVersion`	`of(Class<?> type)` Extracts a class' class version.
`static ClassFileVersion`	`of(Class<?> type, ClassFileLocator classFileLocator)` Extracts a class' class version.
`static ClassFileVersion`	`of(TypeDescription typeDescription, ClassFileLocator classFileLocator)` Extracts a class' class version.
`static ClassFileVersion`	`ofJavaVersion(int javaVersion)` Creates a class file version for a given major release of Java.
`static ClassFileVersion`	`ofMinorMajor(int versionNumber)` Creates a wrapper for a given minor-major release of the Java class file file.
`static ClassFileVersion`	`ofThisVm()` Finds the highest class file version that is compatible to the current JVM version.
`static ClassFileVersion`	`ofThisVm(ClassFileVersion fallback)` Finds the highest class file version that is compatible to the current JVM version.
`String`	`toString()`

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Field Detail
  - BASE_VERSION
```
protected static final int BASE_VERSION
```
    Returns the minimal version number that is legal.
    
    See Also:
    
    Constant Field Values
  - JAVA_V1
```
public static final ClassFileVersion JAVA_V1
```
    The class file version of Java 1.
  - JAVA_V2
```
public static final ClassFileVersion JAVA_V2
```
    The class file version of Java 2.
  - JAVA_V3
```
public static final ClassFileVersion JAVA_V3
```
    The class file version of Java 3.
  - JAVA_V4
```
public static final ClassFileVersion JAVA_V4
```
    The class file version of Java 4.
  - JAVA_V5
```
public static final ClassFileVersion JAVA_V5
```
    The class file version of Java 5.
  - JAVA_V6
```
public static final ClassFileVersion JAVA_V6
```
    The class file version of Java 6.
  - JAVA_V7
```
public static final ClassFileVersion JAVA_V7
```
    The class file version of Java 7.
  - JAVA_V8
```
public static final ClassFileVersion JAVA_V8
```
    The class file version of Java 8.
  - JAVA_V9
```
public static final ClassFileVersion JAVA_V9
```
    The class file version of Java 9.
- Constructor Detail
  - ClassFileVersion
```
protected ClassFileVersion(int versionNumber)
```
    Creates a wrapper for a given minor-major release of the Java class file file.
    
    Parameters:
    
    versionNumber - The minor-major release number.
- Method Detail
  - ofMinorMajor
```
public static ClassFileVersion ofMinorMajor(int versionNumber)
```
    Creates a wrapper for a given minor-major release of the Java class file file.
    
    Parameters:
    
    versionNumber - The minor-major release number.
    
    Returns:
    
    A representation of the version number.
  - ofJavaVersion
```
public static ClassFileVersion ofJavaVersion(int javaVersion)
```
    Creates a class file version for a given major release of Java. Currently, all versions reaching from Java 1 to Java 8 are supported.
    
    Parameters:
    
    javaVersion - The Java version.
    
    Returns:
    
    A wrapper for the given Java class file version.
  - ofThisVm
```
public static ClassFileVersion ofThisVm()
```
    Finds the highest class file version that is compatible to the current JVM version. Prior to Java 9, this is achieved by parsing the java.version property which is provided by System.getProperty(String). If the system property is not available, an IllegalStateException is thrown.
    
    Returns:
    
    The currently running Java process's class file version.
  - ofThisVm
```
public static ClassFileVersion ofThisVm(ClassFileVersion fallback)
```
    Finds the highest class file version that is compatible to the current JVM version. Prior to Java 9, this is achieved by parsing the java.version property which is provided by System.getProperty(String). If the system property is not available, the fallback version is returned.
    
    Parameters:
    
    fallback - The version to fallback to if locating a class file version is not possible.
    
    Returns:
    
    The currently running Java process's class file version or the fallback if locating this version is impossible.
  - of
```
public static ClassFileVersion of(Class<?> type)
                           throws IOException
```
    Extracts a class' class version. The class' byte code is located by querying the ClassLoader of the class.
    
    Parameters:
    
    type - The type for which to locate a class file version.
    
    Returns:
    
    The type's class file version.
    
    Throws:
    
    IOException - If an error occurs while reading the class file.
  - of
```
public static ClassFileVersion of(Class<?> type,
                                  ClassFileLocator classFileLocator)
                           throws IOException
```
    Extracts a class' class version.
    
    Parameters:
    
    type - The type for which to locate a class file version.
    
    classFileLocator - The class file locator to query for a class file.
    
    Returns:
    
    The type's class file version.
    
    Throws:
    
    IOException - If an error occurs while reading the class file.
  - of
```
public static ClassFileVersion of(TypeDescription typeDescription,
                                  ClassFileLocator classFileLocator)
                           throws IOException
```
    Extracts a class' class version.
    
    Parameters:
    
    typeDescription - The type for which to locate a class file version.
    
    classFileLocator - The class file locator to query for a class file.
    
    Returns:
    
    The type's class file version.
    
    Throws:
    
    IOException - If an error occurs while reading the class file.
  - getMinorMajorVersion
```
public int getMinorMajorVersion()
```
    Returns the minor-major release number of this class file version.
    
    Returns:
    
    The minor-major release number of this class file version.
  - getMajorVersion
```
public int getMajorVersion()
```
    Returns the major version this instance represents.
    
    Returns:
    
    The major version this instance represents.
  - getMinorVersion
```
public int getMinorVersion()
```
    Returns the minor version this instance represents.
    
    Returns:
    
    The minor version this instance represents.
  - getJavaVersion
```
public int getJavaVersion()
```
    Returns the Java runtime version number of this class file version.
    
    Returns:
    
    The Java runtime version.
  - isAtLeast
```
public boolean isAtLeast(ClassFileVersion classFileVersion)
```
    Checks if this class file version is at least of the provided version.
    
    Parameters:
    
    classFileVersion - The version to check against.
    
    Returns:
    
    true if this version is at least of the given version.
  - isLessThan
```
public boolean isLessThan(ClassFileVersion classFileVersion)
```
    Checks if this class file version is less than the provided version.
    
    Parameters:
    
    classFileVersion - The version to check against.
    
    Returns:
    
    true if this version is less than the given version.
  - compareTo
```
public int compareTo(ClassFileVersion other)
```
    Specified by:
    
    compareTo in interface Comparable<ClassFileVersion>
  - equals
```
public boolean equals(Object other)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object

Class ClassFileVersion

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

BASE_VERSION

JAVA_V1

JAVA_V2

JAVA_V3

JAVA_V4

JAVA_V5

JAVA_V6

JAVA_V7

JAVA_V8

JAVA_V9

Constructor Detail

ClassFileVersion

Method Detail

ofMinorMajor

ofJavaVersion

ofThisVm

ofThisVm

of

of

of

getMinorMajorVersion

getMajorVersion

getMinorVersion

getJavaVersion

isAtLeast

isLessThan

compareTo

equals

hashCode

toString