It is not always the case as we can have character value but for that, we need to learn about the other parameter that we can pass in the parseInt method. So, we need to make sure about the value we pass to the parseInt function. The java parseInt method only works when we pass the string of the numeric value, but if we pass a character value in the parseInt method then it will raise a NumberFormatException. What errors can occur while using java parseInt method? This type of errors can occur in real-time, so to avoid such mistakes by using the parseInt method and converting the string to integer, we can add any number to get the desired output as we got here as 110 after the use of java parseInt method. But as it was in a string format, it took “+” sign as concatenation operator and joined the number 10 with the input 100 giving output 10010. First, we took the input of the numeric value as a string and displayed it by adding numeric value 10 to it. This is a basic program to understand the use of parseInt method. ("After using java parseInt: " + (a+10)) The integer value is displayed after type conversion plus 10 Now we convert the numeric input value to integer and store in variable a ("Before using java parseInt: " + (s1+10)) we take input of a numeric value as a string We create a scanner object to take input from the user There are similar classes and methods for every other datatype as well, but we are going to mainly focus on parseInt java. So, with the help of parseInt method of integer class, we can have type conversion of data. It will convert the given data to integer datatype.This method belongs to Integer class in java which comes under java.lang package. Now, we need to retrieve a value whose data type is an integer, for doing so we have this method parseInt(). So now, let us think of a database with all values as strings. So, may database engineers keep the data in the form of strings, all the different types of data is converted so that it would be easy to retrieve data. But what is the point in doing this task when you can take input directly in integer form?Īs we are familiar with many different datatypes in programming languages, if we keep all the big database data in all traditional datatypes format, then it would be difficult for a new person to predict the datatype of particular data and this will be very frustrating. In java language, there is a method for converting the string value to integer value. In java language, parseint Java is a method for converting the string value to integer value.
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