import java.text.DecimalFormat;
public class Hello {
public static void main(String[] args) throws Exception {
DecimalFormat df = new DecimalFormat("###,###.##");
String s = df.format(1234.56123);
System.out.println(s);
DecimalFormat df1 = new DecimalFormat("###,###.000");
String s1 = df1.format(1234.56);
System.out.println(s1);
}
}
import java.math.BigDecimal;
public class Hello {
public static void main(String[] args) throws Exception {
BigDecimal v1 = new BigDecimal(100);
BigDecimal v2 = new BigDecimal(200);
BigDecimal v3 = v1.add(v2);
System.out.println(v3);
}
}