Basics of java (1)

Basics of java (1)

• 1.
  Basics of Java(1) Prepared by Rushit Bhadaniya
• 2.
  Simple JAVA Program classone { public static void main(String[] arg) { System.out.println(“MY first Java Program“); } } Prepared by Rushit Bhadaniya
• 3.
  First Line [class one ] •class one declares a class •Everything must be placed inside a class. •Class is KEYWORD Prepared by Rushit Bhadaniya
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  Opening Brace [{ ] •Every class definition in java begins with an opening brace “{” and ends with closing brace “}” Prepared by Rushit Bhadaniya
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  Main line [ publicstatic void main(String[] arg) ] •This line contains 3 keywords •public • static • void Prepared by Rushit Bhadaniya
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  public • Public keywordis an Access specifier. • If Method has access specifier as public that means it can be accessible to all other classes. Prepared by Rushit Bhadaniya
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  static •Static keyword declaremethod as one that belongs to entire class not a part of any objects of the class. •Main must always be declared as static. Prepared by Rushit Bhadaniya
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  void •Void keyword statesthat the main method does not return any value Prepared by Rushit Bhadaniya
• 9.
  Output line •In clanguage we use printf(“ ”); •In c++ we use cout<<“ ”; •In java we have to use • System.out.println(“ ”); println is a member of the out object, which is static data member of System class. Prepared by Rushit Bhadaniya
• 10.
  Output line •In clanguage we use printf(“ ”); •In c++ we use cout<<“ ”; •In java we have to use • System.out.println(“ ”); println is a member of the out object, which is static data member of System class. Prepared by Rushit Bhadaniya
• 11.
  Save program asone.java
• 12.
  Compile and runsource file
• 13.
  Thank You!!!