Parsing and Formatting a Big Integer into Binary

   

import java.math.BigInteger;

public class Main {
  public static void main(String[] argv) throws Exception {
    BigInteger bi = new BigInteger("1023");
    // Parse and format to binary
    bi = new BigInteger("1111111111", 2); 
    String s = bi.toString(2); 
  }
}

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Parsing and Formatting a Big Integer into Binary : BigInteger « Data Type « Java

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