Java PushbackReader(Reader in, int size) Constructor
Syntax
PushbackReader(Reader in, int size) constructor from PushbackReader has the following syntax.
public PushbackReader(Reader in, int size)
Example
In the following code shows how to use PushbackReader.PushbackReader(Reader in, int size) constructor.
// w w w .j a v a2s . co m
import java.io.*;
public class Main {
public static void main(String[] args) {
String s = "from java2s.com";
StringReader sr = new StringReader(s);
// create a new PushBack reader based on our string reader
PushbackReader pr = new PushbackReader(sr, 20);
try {
// read the first five chars
for (int i = 0; i < 5; i++) {
char c = (char) pr.read();
System.out.println(c);
}
// unread a character
pr.unread('F');
// read the next char, which is the one we unread
char c = (char) pr.read();
System.out.println( c);
pr.close();
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
The code above generates the following result.
Home »
Java Tutorial »
java.io »
Java Tutorial »
java.io »