Java.lang Boolean Class

Introduction

The java.lang.Boolean class wraps a value of the primitive type boolean in an object. An object of type Boolean contains a single field whose type is boolean.

Java.lang.Byte Class

Introduction

The java.lang.Byte class wraps a value of primitive type byte in an object. An object of type Byte contains a single field whose type is byte.

Java.lang.Character Class

Introduction

The java.lang.Character class wraps a value of the primitive type char in an object. An object of type Character contains a single field whose type is char.

Java.lang.Character.Subset Class

Introduction

The java.lang.Character.Subset class instances represent particular subsets of the Unicode character set. The only family of subsets defined in the Character class is UnicodeBlock.

Java.lang.Character.UnicodeBlock Class

Introduction

The java.lang.Character.UnicodeBlock class is a family of character subsets representing the character blocks in the Unicode specification. Character blocks generally define characters used for a specific script or purpose.

Java.lang.Class Class

Introduction

The java.lang.Class class instance represent classes and interfaces in a running Java application.It has no public constructor.

Java.lang.ClassLoader Class

Introduction

The java.lang.ClassLoader class is an object that is responsible for loading classes. This class is an abstract class. It may be used by security managers to indicate security domains.

Java.lang.Compiler Class

Introduction

The java.lang.Compiler class is provided to support Java-to-native-code compilers and related services. By design, it serves as a placeholder for a JIT compiler implementation.

Java.lang.Double Class

Introduction

The java.lang.Double class wraps a value of the primitive type double in an object. An object of type Double contains a single field whose type is double.

Java.lang.Enum Class

Introduction

The java.lang.Enum class is the common base class of all Java language enumeration types.

Java.lang.Float Class

Introduction

The java.lang.Float class wraps a value of primitive type float in an object. An object of type Float contains a single field whose type is float.

Java.lang.InheritableThreadLocal Class

Introduction

The java.lang.InheritableThreadLocal class extends ThreadLocal to provide inheritance of values from parent thread to child thread: when a child thread is created, the child receives initial values for all inheritable thread-local variables for which the parent has values.

Java.lang.Integer Class

Introduction

The java.lang.Integer class wraps a value of the primitive type int in an object. An object of type Integer contains a single field whose type is int.

Java.lang.Long Class

Introduction

The java.lang.Long class wraps a value of the primitive type long in an object. An object of type Long contains a single field whose type is long.

Java.lang.Math Class

Introduction

The java.lang.Math class contains methods for performing basic numeric operations such as the elementary exponential, logarithm, square root, and trigonometric functions.

Java.lang.Number Class

Introduction

The java.lang.Number class is the superclass of classes BigDecimal, BigInteger, Byte, Double, Float, Integer, Long, and Short.The Subclasses of Number must provide methods to convert the represented numeric value to byte, double, float, int, long, and short.

Java.lang.Object Class

Introduction

The java.lang.Object class is the root of the class hierarchy. Every class has Object as a superclass. All objects, including arrays, implement the methods of this class.

Java.lang.Package Class

Introduction

The java.lang.Package class contain version information about the implementation and specification of a Java package

Java.lang.Process Class

Introduction

The java.lang.Process class provides methods for performing input from the process, performing output to the process, waiting for the process to complete, checking the exit status of the process, and destroying (killing) the process.

Java.lang.ProcessBuilder Class

Introduction

The java.lang.ProcessBuilder class is used to create operating system processes.This class is not synchronized.