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Wrong output displayed in Java Program

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My output display this: Mortgagecalculator@7ced01

The output should display Years: 30, Loan Amount $200000.00, Interest Rate: .0575, and Monthly Payment: Calculated by Math.POW. Then a list of loan balance and interest paid for each payment over the term of the loan should scroll off the screen, but need loops to display a partial list, hesitate and then display more of the list. Do not use a graphical user interface. Please insert comments in the program so I can understand the fixes.

The setter and getters must stay in MortgageCalculator.java and everything should output from main (Driver.java).


import java.util.*;
/***Created on June 27, 2004, 5:07 PM
* Java Programming Project Workshop 3 -
* Problem statement - Create a driver for the Mortgage Calculator
* Scope - declare, initialize and set values and display mortgage calculator
* @author TERRY PARKER
public class Driver {

* @param args the command line arguments
public static void main(String args[]){//The main part of Mortgage Calculator begins here
Mortgagecalculator mCalc;
mCalc = new Mortgagecalculator();
System.out.println(mCalc.toString());//Display the contents
}//end of group
}//closing bracket


/** mortgagecalculator.java
* Created on June 27, 2004, 5:07 PM
* Java Programming Project Workshop 2 -
* Problem statement - Create a Mortgage Calculator WITHOUT a graphical user interface
* Purpose - provide a user-friendly service to potential users for accurately planning mortgage and other types of loans
* Scope - The mortgage calculator must display the mortgage payment amount given the amount of the mortgage, the term of the mortgage, and the interest rate of the mortgage.
* This program must have hard code amount = 200,000, term= 30 years, and the interest rate = 5.75% in class driver.java
* Algorithm - standard loan calculation with fixed number of payments:
* Monthly Payment = Principal * (InterestRate / (1 - (InterestRate + 1) - 12 * Periods)
* Inputs:
* Principal = $200,000
* Interest Rate = 0.0575
* Periods = 360
* Output:
* Monthly Payment =
* @author TERRY PARKER

public class Mortgagecalculator{

/** Creates a static mortgagecalculator */

public int years;//define variables
public double loanAmount;
public double interestRate;
public double monthlyPayment;

public void setYears(int inYears)//setter
}//end set years

public int getYears()//getter
return years;
}//end get years

public void setLoanAmount(double inLoanAmount)//setter
}//end set loanAmount

public double getLoanAmount()//getter
return loanAmount;
}//end get loanAmount

public void setInterestRate(double inInterestRate)//setter
}//end set interestRate

public double getInterestRate()//getter
return interestRate;
}//end get interestrate

public void CalcMonthlyPayment()
monthlyPayment=loanAmount*Math.pow(1 + interestRate, years) * interestRate/(Math.pow(1 + interestRate, years) -1);

public String toString(double value){//strings are used to store text and variables
String retString = new String();
retString = "Values:";
retString = retString + " years=" + years;
retString = retString + " loanAmount=" + loanAmount;
retString = retString + " interestRate=" + interestRate;
retString = retString + " monthlyPayment=" + monthlyPayment;
return retString;
}//end group
}//closing bracket

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Solution Summary

The solution solves a java problem which has a wrong output displayed.

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Downloading the latest version of Java from the Sun web site is a excellent idea, provided you have a fast Internet connection. Sun also provides a downloadable IDE called NetBeans. This IDE has a level of support from Sun that the IDE on the CD-ROM may not.

For your assignment to be graded, you must identify yourself by including Java comment block at the beginning of your program source code. This comment block must include your name, the date, the assignment number, and your student identification number. You also must provide a description and list of key variables and parameters used.

An example of the minimum Java comment block is:

* Name: Who you are.
* Date: When you did the work.
* Assignment: Number
* Student Number: AAXXXXXXX
* Description: This program does a, b, and c.

You must name your Java class files (your source code) by concatenating the assignment number (A1 through A4) and your student identification number. For example, if your student number were AB7654321, the your Java class file would be named: A1AB7654321...A7AB7654321.

If any assignment fails to compile cleanly, it must be reworked. It will be embarrassing if any of your programs were to fail to compile because the filename and class name did not agree.

In naming your variables, it is essential that you use an acceptable, consistent style and reasonable variable names. Variable names like x, y, and z are to be avoided. If your program needs to compute a total, then an appropriate variable for storing the value would be total or totValue or another meaningful identifier.

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Finally, your .java file must be in plain text suitable for editing using Notepad. It must not have embedded tabs or graphic characters. If you edit your file using an operating system that does not included a carriage return and line feed at the end of each line (Linux), then you must state that in each submission so the instructor knows to convert it -- the instructor looks at every submission, line by line, in Notepad!

Programming Assignment 1:
Write a console program that prompts the user to input the length and width of a rectangle and then prints the rectangle's area and perimeter. Note that a "console program" is one that is runnable from the MS-DOS command prompt.

Programming Assignment 2:
Write a console program that:
1. Uses a while loop to perform the following steps:
- Prompt the user to input two integers: firstNum and secondNum where secondNum is at least 10 greater than firstNum, both numbers are positive integers, and secondNum is less than 1000.
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2. Uses a for loop to perform the following steps:
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1. Inclusive means that the firstNum and secondNum are output if appropriate.
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3. The instructor will attempt to crash your program by entering numbers you don't expect -- if you program thros an exception you will be marked down!
4. While this looks like a daunting task, it is actually very simple -- just think it through!

Programming Assignment 3:
Write a program that consists of three classes. The first class will be the actual program. The second class will simply convert a string to lower case. The third class will have three methods:

public static String trimmed(String str)


public static String trimmed(String str, int len)


public static String squeeze(String str)

The 1st trimmed method will return str without leading or trailing whitespace and will return an empty string if str is null.

The 2nd trimmed method will return the first len characters after trimming the string. The 2nd method must make use of the 1st method.

The squeeze method will replace all sequences of 2 spaces with 1 space.

The program will read a file containing the data below (cut and paste it into notepad and save it), and will display each line:
1. as entered but trimmed and squeezed.
2. as entered but trimmed, squeezed, and shortened to 10 characters
3. as entered but trimmed, squeezed, converted to lower case, and shortened to 20 characters.
Data (copy after this line down to (not including) the line that says end data, you will have 5 lines):
This is a test, this is only a test!

This test is a test of your Java programming skills!
end data

Grading Notes:
1. You can do this program however you like (console, GUI, AWT, Swing, Applet, etc.).
2. If you use an inner classes for the second and third classes, you will receive up to 5 extra points, and if the third class is anonymous, you will receive up to five additional points.
3. If you make the program graphical, you will receive up to 10 extra points (total won't exceed 100).
4. You will lose points for poor formatting, poor commenting, not following instructions, program that don't work, etc.
5. In any case, your total cannot exceed 100 points.
6. Since this is the 3rd assignment, you are expected to get this right before you turn it in. It will be graded much more rigorously than the earlier assignments and in most cases, you won't get a second chance! If something is confusing in the instructions, ask before submitting!

Programming Assignment 4:
Write a console program that repeatedly prompts the user to enter data until they type done (any case, Upper, Lower, or Mixed). As they enter the data, assign it to a two-dimension array where the first dimension contains exactly what they type and the second dimension contains the first non-whitespace character of what they type, in lowercase. If they enter a blank line, it is acceptable to skip that line. When they type done, do these steps:
1. display: As Entered
2. for each entry in the array, display the index of the first dimension, the second dimension's value, and the first dimension's value on a single line separated by : (colon).
3. display: Bubble Sorted
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5. display: Selection Sorted
6. using a selection sort, for each entry in the array, display the original index of the first dimension, the second dimension's value, and the first dimension's value on a single line separated by : (colon) sorted by the first dimension.
Grading Notes:
1. Please read the instructions carefully! Using the wrong sort or dimension will hurt your grade!
2. The instructor will attempt to crash your program -- an exception will cost you 10 points -- don't let exceptions happen!
3. If you ensure that duplicate values are sorted with the lower original array index first, you will get 5 extra points (final score not over 100).
4. You can use the sort methods from the book, but you will get 5 extra points if you do them as inner classes and FULLY comment them (final score not over 100).
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User types:
You display:
As entered
Bubble Sorted
Selection Sorted

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