Java2007-10-14
Verifying a Signed JAR File example
To verify a signed JAR file, that is, to verify that the signature is valid and the JAR file has not been tampered with, use a command such as the following: jarsigner -verify sbun
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Java2007-10-14
Signing a jar file example
Suppose you have a JAR file named bundle.jar and you'd like to sign it using the private key of the user whose keystore alias is jane in the keystore named mystore in the working d
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Using jar utility in Java - A jar tutorial
The jar tool combines multiple files into a single JAR archive file. jar is a general-purpose archiving and compression tool, based on ZIP and the ZLIB compression format. However,
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javac options in Java
The compiler has a set of standard options that are supported on the current development environment and will be supported in future releases. An additional set of non-standard opt
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Compiling multiple source files and specifying classpath using javac
Assuming you have a folder named greetings and you have copied all your java source files in that folder, you can compile all of these files with a single command rather than compi
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How to compile a Java program - javac
One source file, Hello.java, defines a class called greetings.Hello. The greetings directory is the package directory both for the source file and the class file and is off the cur
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Java2007-10-13
The equals() Method example in Java
The equals() method compares two objects for equality and returns true if they are equal. The equals() method provided in the Object class uses the identity operator (==) to determ
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The clone() Method in Java
If a class, or one of its superclasses, implements the Cloneable interface, you can use the clone() method to create a copy from an existing object. To create a clone, you write: a
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Inheritance Example in Java
Here is the sample code for a possible implementation of a Bicycle class and demonstrates the concept of Inheritance in JAVA.
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interface Example in Java
In the Java programming language, an interface is a reference type, similar to a class, that can contain only constants, method signatures, and nested types. There are no method bo
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Inner Class Example in Java
To see an inner class in use, consider a simple stack of integers. Stacks, which are a common data structure in programming, are well-named they are like a "stack" of dishes. When
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public, private, protected modifiers in Java
A class may be declared with the modifier public, in which case that class is visible to all classes everywhere. If a class has no modifier (the default, also known as package-priv
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