Learning Resources
Java. lang
The java.langpackage provides classes that are fundamental to the design of the JavaTM programming language. The java.lang.refsand java.lang.reflectpackages provide, respectively, reference-object classes and APIs for obtaining reflective information about classes.
The java.lang package
Each package defines a number of classes, interfaces, exceptions, and errors. For example, in Java 1.1 the java.lang package contains these:
Interfaces in java.lang
- Cloneable
- Runnable
Classes in java.lang
- Boolean
- Byte
- Character
- Class
- ClassLoader
- Compiler
- Double
- Float
- Integer
- Long
- Math
- Number
- Object
- Process
- Runtime
- SecurityManager
- Short
- String
- StringBuffer
- System
- Thread
- ThreadGroup
- Throwable
- Void
Exceptions in java.lang
- ArithmeticException
- ArrayIndexOutOfBoundsException
- ArrayStoreException
- ClassCastException
- ClassNotFoundException
- CloneNotSupportedException
- Exception
- IllegalAccessException
- IllegalArgumentException
- IllegalMonitorStateException
- IllegalStateException
- IllegalThreadStateException
- IndexOutOfBoundsException
- InstantiationException
- InterruptedException
- NegativeArraySizeException
- NoSuchFieldException
- NoSuchMethodException
- NullPointerException
- NumberFormatException
- RuntimeException
- SecurityException
- StringIndexOutOfBoundsException
Errors in java.lang
- AbstractMethodError
- ClassCircularityError
- ClassFormatError
- Error
- ExceptionInInitializerError
- IllegalAccessError
- IncompatibleClassChangeError
- InstantiationError
- InternalError
- LinkageError
- NoClassDefFoundError
- NoSuchFieldError
- NoSuchMethodError
- OutOfMemoryError
- StackOverflowError
- ThreadDeath
- UnknownError
- UnsatisfiedLinkError
- VerifyError
- VirtualMachineError