Java for Android Week 4 Coursera

   
   

course link: https://www.coursera.org/learn/java-for-android/home/welcome

TODO Codes are given here


Logic.java

package mooc.vandy.java4android.calculator.logic;

import java.util.HashMap;

import mooc.vandy.java4android.calculator.ui.ActivityInterface;

/**
 * Performs an operation selected by the user.
 */
public class Logic implements LogicInterface {
    private static final int ADDITION = 1;
    private static final int SUBTRACTION = 2;
    private static final int MULTIPLICATION = 3;
    private static final int DIVISION = 4;
    /**
     * Reference to the Activity output.
     */
    protected ActivityInterface mOut;

    
    /**
     * Constructor initializes the field.
     */
    public Logic(ActivityInterface out) {
        mOut = out;
        
    }

    

    /**
     * Perform the operation on argumentOne and argumentTwo.
     */
    public void process(int argumentOne, int argumentTwo, int operation) {
        // TODO - Put your code here.

        if(operation == ADDITION) {
            Add a1 = new Add(argumentOne, argumentTwo);
            mOut.print(a1.toString());
        }
        else if(operation == SUBTRACTION) {
            Subtract s1 = new Subtract(argumentOne, argumentTwo);
            mOut.print(s1.toString());
        }
        else if (operation == MULTIPLICATION) {
            Multiply m1 = new Multiply(argumentOne, argumentTwo);
            mOut.print(m1.toString());
        }
        else {
            Divide d1 = new Divide(argumentOne, argumentTwo);
            mOut.print(d1.toString());
        }

    }
    }

Add.java

package mooc.vandy.java4android.calculator.logic;

/**
 * Perform the Add operation.
 */
public class Add {
    // TODO - add your solution here.
    private int argOne = 0;
    private int argTwo = 0;

    public Add(int argumentOne, int argumentTwo) {
        argOne = argumentOne;
        argTwo = argumentTwo;
    }

    public String toString() {
        return String.valueOf(argOne + argTwo);
    }
}

Subtract.java

package mooc.vandy.java4android.calculator.logic;

/**
 * Perform the Subtract operation.
 */
public class Subtract {
    // TODO - add your solution here.
    private int argOne = 0;
    private int argTwo = 0;

    public Subtract(int argumentOne, int argumentTwo) {
        argOne = argumentOne;
        argTwo = argumentTwo;
    }

    public String toString() {
        if(argOne>=argTwo)
            return String.valueOf(argOne - argTwo);
        else
            return String.valueOf(argTwo - argOne);
    }
}

Multiply.java

package mooc.vandy.java4android.calculator.logic;

/**
 * Perform the Multiply operation.
 */
public class Multiply {
    // TODO - add your solution here.
    private int argOne = 0;
    private int argTwo = 0;

    public Multiply(int argumentOne, int argumentTwo) {
        argOne = argumentOne;
        argTwo = argumentTwo;
    }

    public String toString() {
        return String.valueOf(argOne * argTwo);
    }
}

Divide.java

package mooc.vandy.java4android.calculator.logic;

/**
 * Perform the Divide operation.
 */
public class Divide {
    // TODO - add your solution here.
    private int mArgumentOne = 0;
    private int mArgumentTwo = 0;

    public Divide(int argumentOne, int argumentTwo) {
        mArgumentOne = argumentOne;
        mArgumentTwo = argumentTwo;
    }

    public String toString() {
        return String.valueOf(mArgumentOne / mArgumentTwo) + " R:" + String.valueOf(mArgumentOne % mArgumentTwo);
    }
}

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Java for android other weeks : https://progies.in/answers/summer-training-2022/java-for-android-coursera

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