String to numeric conversion

1. String to numeric conversion

2. String to numeric conversion

3. String to integer Conversion
import java.util.Scanner;
class Main
{
public static void main(String args[])
{
String str;
Scanner s=new Scanner(System.in);
str=s.nextLine();
int num=Interger.valueOf(str);
or
int num=Interger.parseInt(str);
System.out.println(“Integer value is “+num);
System.out.println(“New value is “+(num+1));
}
}
Input :
12
Expected Output:
Integer value is 12
New value is 13

4. String to float Conversion

5. String to Number Datatypes (parse
Method)
Method Description
Integer.parseInt(str) String to Integer
Float.parseFloat(str) String to Float
Double.parseDouble(str) String to Double
Long.parseLong(str) String to Long
Short.parseShort(str) String to Short
Byte.parseByte(str) String to Byte
Boolean.parseBoolean(str) String to Boolean

6. String to Number Datatypes
(valueof)
Method Description
Integer.valueOf(str) String to Integer
Float.valueOf(str) String to Float
Double.valueOf(str) String to Double
Long.valueOf(str) String to Long
Short.valueOf(str) String to Short
Byte.valueOf(str) String to Byte
Boolean.valueOf(str) String to Boolean