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String to int in Java
Converting a String to an int in Java can be done using methods provided in the class, such as or methods.
Example:
The most common method to convert a string to a primitive int is Integer.parseInt().
It throws a if the string contains non-numeric characters.
Other Ways to Convert String to int
Using Integer.valueOf() Method
The Integer.valueOf() method converts a String to an Integer object instead of a primitive unbox it to an int.
Note: valueOf() methoduses parseInt() internally to convert to integer.
Example:
Handling Errors for Non-Numeric Strings
If a string literal does not contain numeric values, calling the Integer.parseInt() or Integer.valueOf() methods will result in a NumberFormatException.
Example:
Output:
Exception in thread "main" java.lang.NumberFormatException: For input string: "" at java.base/java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.base/java.lang.Integer.parseInt(Integer.java:662) at java.base/java.lang.Integer.parseInt(Integer.java:770) at S- how cast string to int in java
- how to convert string to int in java without using parseint