Int2BinaryString.java

/******************************************************************************
* Compilation: javac Int2BinaryString.java
* Execution: java Int2BinaryString n
*
* Prints out n in binary.
*
* % java Int2BinaryString 5
* 101
*
* % java Int2BinaryString 106
* 1101010
*
* % java Int2BinaryString 0
* 0
*
* % java Int2BinaryString 16
* 10000
*
* Limitations
* -----------
* Does not handle negative integers or 0.
*
* Remarks
* -------
* could use Integer.toBinaryString(n) instead.
*
******************************************************************************/

public class Int2BinaryString {
public static void main(String[] args) {
int n = Integer.parseInt(args[0]);

// repeatedly divide by two, and form the remainders backwards
String s = "";
for (int i = n; i > 0; i /= 2) {
s = (i % 2) + s;
}
System.out.println(s);
}
}