Create BigDecimals

BigDecimal(BigInteger val): Converts a BigInteger into a BigDecimal.
BigDecimal(BigInteger unscaledVal, int scale): Converts a BigInteger with scale into a BigDecimal.
BigDecimal(BigInteger unscaledVal, int scale, MathContext mc): Converts a BigInteger and an int scale into a BigDecimal, with rounding according to the context settings.
BigDecimal(BigInteger val, MathContext mc): Converts a BigInteger into a BigDecimal rounding according to the context settings.
BigDecimal(char[] in): Converts a character array representation of a BigDecimal into a BigDecimal, accepting the same sequence of characters as the BigDecimal(String) constructor.
BigDecimal(char[] in, int offset, int len): Converts a character array representation of a BigDecimal into a BigDecimal.
BigDecimal(char[] in, int offset, int len, MathContext mc): Converts a character array representation of a BigDecimal into a BigDecimal, according to the context settings.
BigDecimal(char[] in, MathContext mc): Converts a character array representation of a BigDecimal into a BigDecimal, according to the context settings.
BigDecimal(double val): Converts a double into a BigDecimal.
BigDecimal(double val, MathContext mc): Converts a double into a BigDecimal, with the context settings.
BigDecimal(int val): Converts an int into a BigDecimal.
BigDecimal(int val, MathContext mc): Converts an int into a BigDecimal, with rounding according to the context settings.
BigDecimal(long val): Converts a long into a BigDecimal.
BigDecimal(long val, MathContext mc): Converts a long into a BigDecimal, with rounding according to the context settings.
BigDecimal(String val): Converts the string representation of a BigDecimal into a BigDecimal.
BigDecimal(String val, MathContext mc): Converts the string into a BigDecimal, with rounding according to the context settings.


import java.math.BigDecimal;
 

public class Main {
 
    public static void main(String[] args) {
        System.out.println(new BigDecimal(1f));
        System.out.println(new BigDecimal(2f));
        
    }
}

The output:

1
2


import java.math.BigDecimal;
import java.math.MathContext;
 

public class Main {
 
    public static void main(String[] args) {
        BigDecimal first = new BigDecimal(1f);
        BigDecimal second = new BigDecimal(1000f);
        BigDecimal result1 = new BigDecimal(first.doubleValue() / second.doubleValue());
        BigDecimal result2 = first.divide(second, MathContext.DECIMAL128);
 
        System.out.println(result1);
        System.out.println(result2);
        System.out.println((first.doubleValue() / second.doubleValue()));
 
    }
}

The output:


0.001000000000000000020816681711721685132943093776702880859375
0.001
0.0010

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BigDecimal: