How to I convert a String to Integer?

Let’s say you have a string – strTest – that contains a numeric value.

String strTest = “100”;

Try to perform some arithmetic operation like divide by 4 – This immediately shows you a compilation error.

Now make use of ParseInt method as follows:

int <IntVariableName> = Integer.parseInt(<StringVariableName>);

Pass the string variable as the argument.

This will convert the String to Integer and store it into the specified integer variable

Check the below code snippet-

String strTest = "100";

		//This statement results in a compilation error as you
		//cannot do arithmetic operation on Strings
		//System.out.println("Using String:" + (strTest/4));

		//Convert the String to Integer
		int iTest = Integer.parseInt(strTest);

		System.out.println("Actual String:"+ strTest);

		System.out.println("Converted to Int:" + iTest);

		//This will now execute some arithmetic operation
		System.out.println("Arithmetic Operation on Int:" + (iTest/4));

Output of the above code snippet- Actual String:100 Converted to Int:100 Arithmetic Operation on Int:25