Java2007-09-14
FileInputStream - sample program in Java
The FileInputStream class creates an InputStream that you can use to read bytes from
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Java2007-09-14
FilenameFilter - sample program in Java
You will often want to limit the number of files returned by the list() method to include only those files that match a certain filename pattern, or filter. To do this, you must us
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list() contents of a Directory - sample program in Java
A directory is a File that contains a list of other files and directories. When you create a File object and it is a directory, the isDirectory() method will return true. In this c
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File example program in Java
Although most of the classes defined by java.io operate on streams, the File class does not. It deals directly with files and the file system. That is, the File class does not spec
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Random class sample program in Java - nextGaussian(), nextBoolean(), nextBytes(), nextInt(), nextLong(), nextFloat(), nextDouble()
The Random class is a generator of pseudorandom numbers. These are called pseudorandom numbers because they are simply uniformly distributed sequences. Random defines the following
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Calendar - sample program in Java
The abstract Calendar class provides a set of methods that allows you to convert a time in milliseconds to a number of useful components. Some examples of the type of information t
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Java2007-09-14
BitSet example in Java
A BitSet class creates a special type of array that holds bit values. This array can increase in size as needed. This makes it similar to a vector of bits. The BitSet constructors
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store() and load() example in Java
One of the most useful aspects of Properties is that the information contained in a Properties object can be easily stored to or loaded from disk with the store() and load() method
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Properties example in Java
Properties is a subclass of Hashtable. It is used to maintain lists of values in which the key is a String and the value is also a String. The Properties class is used by many othe
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Hashtable example in Java
Hashtable was part of the original java.util and is a concrete implementation of a Dictionary. However, Java 2 reengineered Hashtable so that it also implements the Map interface.
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Stack example in Java - push(), pop(), empty(), search()
Stack is a subclass of Vector that implements a standard last-in, first-out stack. Stack only defines the default constructor, which creates an empty stack. Stack includes all the
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Vector example in Java
Vector implements a dynamic array. It is similar to ArrayList, but with two differences: Vector is synchronized, and it contains many legacy methods that are not part of the collec
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