java check if number is decimal code example

Example 1: how to check for a decimal point in java

d % 1 == 0
//THIS CHECKS IF VARIABLE D IS A WHOLE NUMBER

Example 2: check if string is decimal java

Scanner in = new Scanner(System.in);
		
		String ip1 = in.nextLine();
		
		if( ip1.matches("^\\d+\\.\\d+") ) 
			System.out.println(ip1+"----is a decimal number");
		else
			System.out.println(ip1+"----is a not decimal number");