Apache common lang

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Java Source Code / Java Documentation » Library » Apache common lang 
The Apache Commons Lang
License:Apache License
URL:http://commons.apache.org/lang/
Description:Provides extra functionality for classes in java.lang.
Package NameComment
org.apache.commons.lang Provides highly reusable static utility methods, chiefly concerned with adding value to {@link java.lang} and other standard core classes. @since 1.0
org.apache.commons.lang.builder Assists in creating consistent equals(Object), toString(), hashCode(), and compareTo(Object) methods. @see java.lang.Object#equals(Object) @see java.lang.Object#toString() @see java.lang.Object#hashCode() @see java.lang.Comparable#compareTo(Object) @since 1.0
org.apache.commons.lang.enum

Deprecated and replaced by {@link org.apache.commons.lang.enums} and will be removed in version 3.0.

All classes in this package are deprecated and repackaged to {@link org.apache.commons.lang.enums} since enum is a Java 1.5 keyword.

Provides an implementation of the C style enum in the Java world.

The classic example being an RGB color enumeration.

public final class ColorEnum extends Enum {
    public static final ColorEnum RED = new ColorEnum("Red");
    public static final ColorEnum GREEN = new ColorEnum("Green");
    public static final ColorEnum BLUE = new ColorEnum("Blue");

    private ColorEnum(String color) {
        super(color);
    }

    public static ColorEnum getEnum(String color) {
        return (ColorEnum) getEnum(ColorEnum.class, color);
    }

    public static Map getEnumMap() {
        return getEnumMap(ColorEnum.class);
    }

    public static List getEnumList() {
        return getEnumList(ColorEnum.class);
    }

    public static Iterator iterator() {
        return iterator(ColorEnum.class);
    }
}
@since 1.0
org.apache.commons.lang.enums

Provides an implementation of the C style enum in the Java world.

The classic example being an RGB color enumeration.

public final class ColorEnum extends Enum {
    public static final ColorEnum RED = new ColorEnum("Red");
    public static final ColorEnum GREEN = new ColorEnum("Green");
    public static final ColorEnum BLUE = new ColorEnum("Blue");

    private ColorEnum(String color) {
        super(color);
    }

    public static ColorEnum getEnum(String color) {
        return (ColorEnum) getEnum(ColorEnum.class, color);
    }

    public static Map getEnumMap() {
        return getEnumMap(ColorEnum.class);
    }

    public static List getEnumList() {
        return getEnumList(ColorEnum.class);
    }

    public static Iterator iterator() {
        return iterator(ColorEnum.class);
    }
}
@since 2.1
org.apache.commons.lang.exception Provides JDK 1.4 style Nested Exception functionality for those on prior Java versions.

Includes a static utility to create version independent Nested Exception which can handle JDK 1.4 Exceptions as well as others.

Lastly, {@link org.apache.commons.lang.exception.ExceptionUtils} also contains Throwable manipulation and examination routines.

@since 1.0
org.apache.commons.lang.math Extends {@link java.math} for business mathematical classes. This package is intended for business mathematical use, not scientific use. @since 2.0
org.apache.commons.lang.mutable Provides typed mutable wrappers to primitive values and Object. @since 2.1
org.apache.commons.lang.text

Provides classes for handling and manipulating text, partly as an extension to {@link java.text}. The classes in this package are, for the most part, intended to be instantiated. (ie. they are not utility classes with lots of static methods)

@since 2.1
org.apache.commons.lang.time

Provides classes and methods to work with dates and durations.

This includes:

  • DateUtils - a set of static utility methods for working with dates
  • FastDateFormat - a replacement for SimpleDateFormat that is fast and thread-safe
  • DateFormatUtils - a formatting class for dates
  • StopWatch - a duration timer
@since 2.0
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