myBigInteger

Class AdditionOnlyInt

java.lang.Object

myBigInteger.AdditionOnlyInt

All Implemented Interfaces:

java.lang.Comparable<BigInt>, BigInt

Direct Known Subclasses:

AddSubInt

public class AdditionOnlyInt
extends java.lang.Object
implements BigInt

This class implements BigInt but only addition operation is actually implemented. Integers are unsigned.

Author:

Chung-Chih Li

Constructor Summary

Constructors

Constructor and Description
AdditionOnlyInt() This is the default constructor set the value to "0";
AdditionOnlyInt(AdditionOnlyInt a) Copy constructor; a deep copy should be performed.
AdditionOnlyInt(java.lang.String a) This is a constructor that construct an AdditionOnlyInt with value presented by the input string.

Method Summary

Modifier and Type	Method and Description
static AdditionOnlyInt	add(AdditionOnlyInt a, AdditionOnlyInt b) The method should not have side-effect.
void	add(BigInt mx) Add an AdditionOnlyInt mx into this BigInt.
int	compareTo(BigInt o) Override the default compareTo method
void	div(BigInt b, BigInt r) Students don't have to implement this method for Asg3.
boolean	equals(java.lang.Object o) Override the default equals method
void	subtract(BigInt s) Students don't have to implement this method for Asg3.
void	times(BigInt a) Students don't have to implement this method for Asg3.
java.lang.String	toString() Override the default toString method

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

AdditionOnlyInt

public AdditionOnlyInt()

This is the default constructor set the value to "0";

AdditionOnlyInt

public AdditionOnlyInt(java.lang.String a)

This is a constructor that construct an AdditionOnlyInt with value presented by the input string. For example, if input a = "00012340", this constructor will set the byte array to have value {0,4,3,2,1}. Note that the leading zeros in the input string should not be stored.

Parameters:

a - is a string such as "00012340"

AdditionOnlyInt

public AdditionOnlyInt(AdditionOnlyInt a)

Copy constructor; a deep copy should be performed.

Parameters:

a - to be copied

Method Detail

compareTo

public int compareTo(BigInt o)

Override the default compareTo method

Specified by:

compareTo in interface java.lang.Comparable<BigInt>

Parameters:

o - is expected to be a BigInt to work correctly

Returns:

0 if equal, -1 if this BigInt is less than x, and +1 if this BigInt is greater than x

equals

public boolean equals(java.lang.Object o)

Override the default equals method

Overrides:

equals in class java.lang.Object

Returns:

true of the two BigInts are equal

add

public void add(BigInt mx)

Add an AdditionOnlyInt mx into this BigInt.

Specified by:

add in interface BigInt

Parameters:

mx - is a BigInt, some type casting is necessary

add

public static AdditionOnlyInt add(AdditionOnlyInt a,
                                  AdditionOnlyInt b)

The method should not have side-effect. I.e., the contents of this, a and b should not be modified.

Parameters:

a - is AdditionOnlyInt

b - is AdditionOnlyInt

Returns:

the result of a+b in an AdditionOnlyInt

toString

public java.lang.String toString()

Override the default toString method

Overrides:

toString in class java.lang.Object

Returns:

this BigInt in a string, e.g., "123456789100".

subtract

public void subtract(BigInt s)

Students don't have to implement this method for Asg3. Just make an empty function body.

Specified by:

subtract in interface BigInt

Parameters:

s - to be substracted

times

public void times(BigInt a)

Students don't have to implement this method for Asg3. Just make an empty function body.

Specified by:

times in interface BigInt

Parameters:

a - is the multiplier

div

public void div(BigInt b,
                BigInt r)

Students don't have to implement this method for Asg3. Just make an empty function body.

Specified by:

div in interface BigInt

Parameters:

b - is the divisor.

r - is a place for remainder.