Problem Statement

Create and display the sequence of binary digits for a given   non-negative integer. The results can be achieved using built-in radix functions within the language   (if these are available),   or alternatively a user defined function can be used. The output produced should consist just of the binary digits of each number followed by a   newline. There should be no other whitespace, radix or sign markers in the produced output, and leading zeros should not appear in the results.

Let's start with the solution:

println(Integer.toBinaryString(5));     //            101
println(Integer.toBinaryString(50));    //         110010
println(Integer.toBinaryString(9000));  // 10001100101000

println(binary(5));     // 00000000000101
println(binary(50));    // 00000000110010
println(binary(9000));  // 10001100101000