Page 246 - Computer science 868 Class 12
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2. parseInt() and ValueOf(): These methods are used to convert String to primitive data type.
The different methods are stated below.
• String to int: In this, a number in String format is converted to Integer format.
String s = "25";
int n;
n=Integer.parseInt(s); OR n=Integer.valueOf(s);
System.out.println("Result :" + n);
Output: Result : 25
• String to long: In this, the String value is converted to long data type.
String s= "25";
long n;
n=Long.parseLong(s); OR n=Long.valueOf(s);
System.out.println("Result :" + n);
Output: Result: 25
• String to float: In this, the String value is converted to a float variable.
String s= "1343";
float n;
n=Float.parseFloat(s); OR n=Float.valueOf(s);
System.out.println("Result :" + n);
Output: Result: 1343;
• String to Double: In this, the String value is converted to double value.
String s= "3278";
double n;
double n=Double.parseDouble(s); OR n=Double.valueOf(s);
System.out.println("Result :" + n);
Output: Result: 1343;
Program 3 Write a program to convert primitive data type to object and vice-versa.
1 class convert
2 {
3 public static void main()
4 {
5 // creates objects of wrapper class
6 Integer intvar = Integer.valueOf(768);
7 Double douvar = Double.valueOf(23.45);
8 // converts into primitive types
9 int in = intvar.intValue();
10 double do1 = douvar.doubleValue();
11 //Printing
12 System.out.println("The value of in : " + in);
13 System.out.println("The value of do: " + do1);
14 //Converts to wrapper object
15 intvar = in;
244244 Touchpad Computer Science-XII

