PushbackInputStreamDemo.java Source code

Introduction

Here is the source code for PushbackInputStreamDemo.java

Source

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.PushbackInputStream;

class PushbackInputStreamDemo {
    public static void main(String args[]) throws IOException {
        String s = "if (a == 4) a = 0;\n";
        byte buf[] = s.getBytes();
        ByteArrayInputStream in = new ByteArrayInputStream(buf);
        PushbackInputStream f = new PushbackInputStream(in);
        int c;

        while ((c = f.read()) != -1) {
            switch (c) {
            case '=':
                if ((c = f.read()) == '=')
                    System.out.print(".eq.");
                else {
                    System.out.print("<-");
                    f.unread(c);
                }
                break;
            default:
                System.out.print((char) c);
                break;
            }
        }
    }
}