Displaying numbers with commas

    

import java.text.DecimalFormat;

public class Main {

  public static void main(String args[]) {

    double d = 123456.78;
    DecimalFormat df = new DecimalFormat("#####0.00");
    System.out.println(df.format(d));

  }
}

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Displaying numbers with commas : Number Format « Data Type « Java

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