I O - Java

Output

• System.out.print(val) => To print in console without new line
• System.out.println(val) => To print in console with new line

Input

• System.GC() => Garbage Collector
• Using Scanner
  • Scanner var = new Scanner(System.in) => Declaring a Scanner class, Buffer size of 1 KB
  • var.close() => Closing the Scanner after use
  • var1 = var.nextInt() => Taking integer Input
    • var.hasNextInt() => Checks if the input is an Integer
  • var1 = var.nextByte()
  • var1 = var.nextShort()
  • var1 = var.nextLong()
  • var1 = var.nextFloat()
  • var1 = var.nextDouble()
  • var1 = var.nextBoolean()
  • String var1 = var.next() => Taking string Input of a single word
  • String var1 = var.nextLine() => Taking string Input of an entire line
• Buffered Reader
  • Declaring a Buffered Reader Class, Buffer size of 8 KB, Faster than Scanner method, Supports threading

      BufferedReader var = new BufferedReader(new InputStreamReader(System.in));
    

  • String var = input.readLine(); => Take String input
• Console
  • Console var = System.console();
  • String var = input.readLine(); => Take String input, Does not keeps a Buffer to store for taking Input
  • char[] var = input.readPassword(); => Takes input as Character array, Does not shows the value typed in console while typing