Taking Input from the user in Java

Taking Input From User

Three ways to accept the value dynamically

• From Cmd prompt
• From keyboard
• From properties file

Cmd prompt: 

• Using main method passing the input values as array of String object (String args[])
• Convert the received String objects using wrapper classes as follows:

              public static xxx parsexxx(String).

              Ex: To convert String to integer

              int a = Integer.parseInt(args[0]);

From Keyboard:

• Use Scanner class from java.util.scanner package
• Scanner s = new Scanner (System.in);

                int firstNumber = s.nextInt();

From properties file:

• Create file name db.properties and data as key=value format as follows:

• Read the properties file using FileReader and properties class in main method as follows: