In this tutorials, I am going to show you how to convert Java String to int.

Convert Java String to Int :

We can convert Java String to int using  Integer wrapper class.

Using String class : Integer.valueOf(String)

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String str = “1500”;
Integer.valueOf(str);

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Using Integer Wrapper : Integer.parseInt(String)

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String str = “100”;
Integer.parseInt(str);

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On the above two possibilities, we can convert the String to int in Java. But while converting, we should take care about exceptions; means the both methods will raise java.lang.NumberFormatException, only if the String can not be convertible to int.

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String str = “1500A”;
Integer.valueOf(str);

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On the above example str contains alphabet, it will not convertible to int, hence we can get NumberFormatException here like below.

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Exception in thread “main” java.lang.NumberFormatException: For input string: “1500A”
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:492)
at java.lang.Integer.valueOf(Integer.java:582)

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Happy Learning 🙂

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