How to convert from String to int in Java ?

In Java projects, conversion between String to int is required very frequently.Below is the different ways to convert from String to int in Java .

We will convert below String

               String stringNumber= "51";

Using Integer.parseInt(String s) 

int convertedNum1=         Integer.parseInt(stringNumber);

System.out.println(convertedNum1);

Using Integer.valueOf(String s)

int convertedNum2= Integer.valueOf(stringNumber);

System.out.println(convertedNum2);

If String is not parsable it throws below NumberFormatException in both cases

Exception in thread "main" java.lang.NumberFormatException: For input string: "51A"

Output:

51

References:

https://docs.oracle.com/javase/tutorial/java/data/converting.html

https://docs.oracle.com/javase/7/docs/api/java/lang/Integer.html

Date and Time operation in Java

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