1. String to Integer:
In java, if we are converting string to integer then using,
Integer.parseInt(String s) method.
public class StringToIntEx{
public static void main(String args[]){
String s="50";
int i=Integer.parseInt(s);
System.out.println(s+100);
System.out.println(i+100);
}}
Output:
50100
150
2. Integer to String:
In java, if we are converting Integer to String then using, Integer. toString(int) or String.valueOf (int) methods.
public class IntegerToStrEx{
public static void main(String args[]){
int n=100;
String s=Integer.toString(n);
String ss=String,valueOf(n);
System.out.println(s+100);
System.out.println(ss+100);
System.out.println(n+100);
}}
Output:
50100
50100
150
3. String to Long:
In java, if we are converting String to Long then using, Long.parseLong (String s).
public class StringToLongEx{
public static void main(String args[]){
String s="8005366665";
long l=Long.parseLong(s);
System.out.println(l);
}}
Output:
8005366665
4. Long to String:
In java, if we are converting Long to String then using, Long. toString (Long) or String.valueOf(Long) methods.
public class LongToStringEx{
public static void main(String args[]){
long l="8005366665";
String s=Long.toString(l);
String ss=String.valueOf(l);
System.out.println(s+100);
System.out.println(ss+100);
}}
Output:
8005366665
8005366665
5. String to Float:
In java, if we are converting String to Float then using, Float.parseFloat (String s) method.
public class StringToFloatEx{
public static void main(String args[]){
String s="50.6";
float f=Float.parseFloat(s);
System.out.println(f);
}}
Output:
50.6
6. String to Double:
In java, if we are converting String to Double then using, Double.parseDouble (String s).
public class StringToDoubleEx{
public static void main(String args[]){
String s="50";
double d=Double.parseDouble(s);
System.out.println(d);
}}
Output:
50
7. String to Date:
We can convert String to Date in java using parse() method of DateFormat and SimpleDateFormat classes. We have also known about DateFormat and SimpleDateFormat classes previously.
import java.text.SimpleDateFormat;
import java.util.Date;
public class StringToDateEx {
public static void main(String[] args)throws Exception {
String D="10/12/2015";
Date D1=new SimpleDateFormat("dd/MM/yyyy").parse(D);
System.out.println(D+"\t"+D1);
}
}
Output:
10/12/2015 Thu Dec 10 07:32:15
IST 2015
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