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Describe the java.lang package ?
Each package describes a number of classes, exceptions, interfaces, and errors. For instance, in Java 1.1 the java.lang package holds 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
What is Multiple Inheritance ? A few object oriented languages, notably C++, permits a class to inherit from more than one unrelated class. This is known as multiple inheritanc
The DispatchAction class is used to group related actions into single class. Using this class, you can have a method for every logical action compared than a one executes method. T
The File class encapsulates the files and directories of the local file system. The RandomAccessFile class gives the methods required to directly access data contained in any part
What is Testing for Equality in java? Testing for equality is a little trickier. You would expect to test if two numbers are equal through using the = sign. However the = sign
Type casting defines treating a variable of one type as though it is another type. When up casting primitives as given below from left to right, automatic conversion happens. Bu
Prompt the user for an int between an upper and lower boundary. Reuse the validateInput() method from project 2 to validate if the input is in bounds. If it is not, print an error
The hashCode() and equals() methods have to be very important, when objects implementing these two functions are added to collections. If not implemented or implemented incorre
COMPSCI220S2C2012 Assignment 1 due 8 August 8:30 pm This assignment introduces you to an example of applied algorithm analysis and shows you why, sometimes, compromises in an algor
In Java everything exists within a class. It describes the behavior of the class and its characteristics. Java applications and applets are built in the class. Rules present for cl
public class Tester { static void test(int[] a) { int[] b = new int[2]; a = b; System.out.print(b.length); System.out.print(a.length); } public static void main(String[] arg
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