Why do we need methods in java

Examples and practices described in this page don't take advantage of improvements introduced in later releases and might use technology no longer available. Modifiers, return types, and parameters will be discussed later in this lesson. Exceptions are discussed in a later lesson. Although a method name can be any legal identifier, code conventions restrict method names.

By convention, method names should be a verb in lowercase or a multi-word name that begins with a verb in lowercase, followed by adjectives, nouns, etc. In multi-word names, the first letter of each of the second and following words should be capitalized.

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Legacy Classes and Interfaces. Java Vector. Stack In Java - java. Stack Class. Java Dictionary Class - java. Java Hashtable. Java Properties Class - java. Properties Class. Collection Framework In Java. More Utility Classes. StringTokenizer In Java. Java BitSet. Java Date Class. Calendar In Java - java. Calendar Class. Java GregorianCalendar.

Java TimeZone Class. Java SimpleTimeZone. Locale Class In Java. Java Random Class - java. Random Package. Java Observable. Java Currency Class. Java Formatter Class. Java Formatter Methods. Java Formatter. Java Formatting Numbers. Usage Of java. Java Regular Expression. Alternative For list Method - listFiles Method.

Java Stream Classes. Byte Streams. Java InputStream Class. Java OutputStream Class. Java FileInputStream. Java FileOutputStream. Java ByteArrayInputStream. Java ByteArrayOutputStream. Java Filtered Byte Streams. Java Buffered Byte Streams. Java BufferedInputStream.

Java PrintStream Class. Java RandomAccessFile. Character Streams. Reader Class In Java. Java Writer Class. Java FileReader. Call to a void method must be a statement i. It is a Java statement which ends with a semicolon as shown in the following example. While working under calling process, arguments is to be passed.

These should be in the same order as their respective parameters in the method specification. Parameters can be passed by value or by reference.

Passing Parameters by Value means calling a method with a parameter. Through this, the argument value is passed to the parameter. The following program shows an example of passing parameter by value. The values of the arguments remains the same even after the method invocation. When a class has two or more methods by the same name but different parameters, it is known as method overloading. It is different from overriding.

In overriding, a method has the same method name, type, number of parameters, etc. Then the concept of overloading will be introduced to create two or more methods with the same name but different parameters.

Overloading methods makes program readable. Here, two methods are given by the same name but with different parameters.