How to use PushbackInputStream class in java

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Hubert Jason · Answer

Hey Simond check this program:class PushbackInputStreamDemo {and public static void main(String args[]) throws IOException {and String s = "if (a == 4) a = 0;\n";and byte buf[] = s.getBytes();and ByteArrayInputStream in = new ByteArrayInputStream(buf);and PushbackInputStream f = new PushbackInputStream(in);and int c;and while ((c = f.read()) != -1) {and switch(c) {and case '=':and if ((c = f.read()) == '=')and System.out.print(".eq.");and else {and System.out.print("andlt;-");and f.unread(c);and }and break;and default:and System.out.print((char) c);and break;and }and }and }and }

Mark Devid · Answer

Hi SimondCheck this program.I hope it will help you.public class PrintCalc {public static void main(String args[]) {PrintCalc app = new PrintCalc();try {app.readAndPrint();} catch (IOException e) {System.out.println("Error encountered during printing");}}
private void readAndPrint() throws IOException {PushbackInputStream f = new PushbackInputStream(System.in, 3);int c, c1, c2;while ((c = f.read()) != 'q') {switch (c) {case '.':System.out.print((char) c);if ((c1 = f.read()) == '0') {if ((c2 = f.read()) == '0') {System.out.print("**");} else {f.unread(c2);f.unread(c1);}} else {f.unread(c1);}break;default:System.out.print((char) c);break;}} f.close();}}

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How to use PushbackInputStream class in java

Simond Gear

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