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import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
class BufferedInputStreamDemo {
public static void main(String args[]) throws IOException {
String s = "This is a © copyright symbol " + "but this is © not.\n";
byte buf[] = s.getBytes();
ByteArrayInputStream in = new ByteArrayInputStream(buf);
BufferedInputStream f = new BufferedInputStream(in);
int c;
boolean marked = false;
while ((c = f.read()) != -1) {
switch (c) {
case '&':
if (!marked) {
f.mark(32);
marked = true;
} else {
marked = false;
}
break;
case ';':
if (marked) {
marked = false;
System.out.print("(c)");
} else
System.out.print((char) c);
break;
case ' ':
if (marked) {
marked = false;
f.reset();
System.out.print("&");
} else
System.out.print((char) c);
break;
default:
if (!marked)
System.out.print((char) c);
break;
}
}
}
}
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