How to convert numeric String to int in java

Answer 1

convert String to an int in java using Integer.parseInt() method. To convert String into Integer, we can use Integer.valueOf() method which returns instance of Integer class.

Answer 2

String str=”0111”;
int t=Integer.parseInt(str);
System.out.println(t);

Integer x = Integer.valueOf(str);
// or
int y = Integer.parseInt(str);

Answer 3

https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html#parseInt-java.lang.String-

Answer 4

Use Integer.parseInt(stringRepr); if you need a primitive int.

Use Integer.valueOf(stringRepr); if you need an Integer object.

Answer 5

Ipang thank you 😊

Answer 6

String str=”0111”;
int t=Integer.parseInt(str);
System.out.println(t);

Integer x = Integer.valueOf(str);
int y = Integer.parseInt(str);

The sbove is two ways to convert from string to int

First way is a wrapperclass used to convert from primitive to object or object to primitive

Next way is an alternate method to convert to int

If we want to convert to string again
For that String.valueOf() can convert back to string data

Answer 7

use typecasting