Check out example codes for "how to get int from string java". It will help you in understanding the concepts better.

Code Example 1

int i = Integer.parseInt(myString);

Code Example 2

String number = "10";
	int result = Integer.parseInt(number);			
	System.out.println(result);
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Code Example 3

public class JavaStringToIntExample
{
  public static void main (String[] args)
  {
    // String s = "fred";  // use this if you want to test the exception below
    String s = "100";
 
    try
    {
      // the String to int conversion happens here
      int i = Integer.parseInt(s.trim());
 
      // print out the value after the conversion
      System.out.println("int i = " + i);
    }
    catch (NumberFormatException nfe)
    {
      System.out.println("NumberFormatException: " + nfe.getMessage());
    }
  }
}

Code Example 4

Integer.parseInt(str);

Code Example 5

// You will receive an error if there are non-numeric characters in the String.
String num = "5";
int i = Integer.parseInt(num);

Code Example 6

import com.google.common.primitives.Ints;

int foo = Optional.ofNullable(myString)
 .map(Ints::tryParse)
 .orElse(0)

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