DataInputStream is filter streams that is used to read strings and primitive data types comprised of more than a single byte. DataInputStream implement the DataInput interface. This interface defines methods for reading strings and all of the Java primitive types, including numbers and Boolean values.
DataInputStream dis = new DataInputStream( System.in );
String ss = dis.readLine();
Consider the following example which reads primitive data types such as int, double from the text file file2.txt and prints the result.
Example:
/**
From dataInputStream.java
*/
import java.io.DataInputStream;
import java.io.FileInputStream;
/**
*
* @author JavaHotSpot
*/
public class dataInputStream
{
public static void main(String args[])
{
try
{
int roll;
char name;
double percentage;
FileInputStream fs = new FileInputStream("C:\\file2.txt");
DataInputStream dins = new DataInputStream(fs);
while(fs.available()>0)
{
roll=dins.readInt();
percentage=dins.readDouble();
System.out.println(roll+" "+percentage);
}
}
catch(Exception ex)
{
System.err.println(ex);
}
}
}
Output:
1 98.34
2 97.32
3 89.65
4 87.34
5 78.12