1. The java.math.BigDecimal.plus() is an inbuilt method in java that returns a BigDecimal whose value is (+this), and whose scale is this.scale(). This method, which simply returns this BigDecimal is included for symmetry with the unary minus method negate().

   Syntax:

   public BigDecimal plus()

   Parameters: The function does not accepts any parameter.

   Return value: This method returns the object value i.e., this.

   Below program illustrates the working of the above metioned method:
   Program 1:

   
   

   
   
   

   // Java program to demonstrate the // plus() method    import java.math.*;    public class Gfg {        public static void main(String[] args)     {            // Assign value to b1         BigDecimal b1 = new BigDecimal("-45.652");            // Assign the result of plus method on         // BigDecimal Objects b1 to b2         BigDecimal b2 = b1.plus();            // Print the value of b2         System.out.println("The value of the BigDecimal is " + b2);     } }

   Output:

   
   

   
   

   The value of the BigDecimal is -45.652
   

   Program 2:

   
   

   
   
   

   // Java program to demonstrate the // plus() method    import java.math.*;    public class gfg {        public static void main(String[] args)     {            // Assign value to b1         BigDecimal b1 = new BigDecimal("7458.3256");            // Assign the result of plus method on         // BigDecimal Objects b1 to b2         BigDecimal b2 = b1.plus();            // Print the value of b2         System.out.println("The value of the BigDecimal is " + b2);     } }

   Output:

   The value of the BigDecimal is 7458.3256
   

2. The java.math.BigDecimal.plus(MathContext mc) is an inbuilt method in java that returns a BigDecimal whose value is (+this), with rounding according to the context settings.

   Syntax:

   public BigDecimal plus(MathContext mc)

   Parameters: This method accepts a single parameter mc which refers to the context of rounding to use i.e., up to what digit the value would be rounded.

   Return value: This method returns the value of BigDecimal Object, rounded as necessary. A zero result will have a scale of 0.

   Below program illustrates the working of the above metioned method:
   Program 1:

   
   

   
   
   

   // Java program to demonstrate the // plus() method    import java.math.*;    public class gfg {        public static void main(String[] args)     {            BigDecimal b1 = new BigDecimal("-452.325");            MathContext m = new MathContext(4); // 4 precision            // Perform plus on BigDecimal Objects b1 using m         BigDecimal b2 = b1.plus(m);            // Print the value of b2         System.out.println("Result of plus is " + b2);     } }

   Output:

   Result of plus is -452.3
   

   Program 2:

   
   

   
   
   

   // Java program to demonstrate the // plus() method    import java.math.*;    public class gfg {        public static void main(String[] args)     {            BigDecimal b1 = new BigDecimal("-10.325");            // 4 precision         MathContext m = new MathContext(4);             // Perform plus on BigDecimal Objects b1 using m         BigDecimal b2 = b1.plus(m);            // Print the value of b2         System.out.println("Result of plus is " + b2);     } }

   Output:

   Result of plus is -10.33
   

Reference: https://docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html#plus()

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