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POI can't figure out my simple Java homework
 

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  1. POI can't figure out my simple Java homework
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    <p>I have this programming assignment that converts between meters and feet, and between kilograms and pounds. When I tell the program I want to convert weight (by entering "w" when prompted), it gives me my the following error:</p> <blockquote> <p><code>Error: Too many input characters error.</code></p> </blockquote> <p>I worked on this for a long time, but can't figure it out. Can someone please tell me how to make the weight conversion work like the length conversion? </p> <pre><code>import java.util.Scanner; /** * This class.. */ public class UnitConversion3b { public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); String maxInputWarning = "\nError: Too many input characters." + "\nProgram is now terminating."; String lengthOrWeight; final double LENGTH_CONVERSION_FACTOR = 3.2808399; final double WEIGHT_CONVERSION_FACTOR = 2.20462; String whichWeightConversion = "empty" , whichLengthConversion = "empty"; double feet = 0, meters = 0, pounds =0 , kilograms = 0; double metersConvertedToFeet, feetConvertedToMeters; double poundsConvertedToKilograms, kilogramsConvertedToPounds; System.out.println(""); System.out.print("What kind of value would you like to convert?"); System.out.print("\nEnter L for length, or W for weight: "); lengthOrWeight = keyboard.nextLine(); if (lengthOrWeight.length() &gt; 1 ) { System.out.println(maxInputWarning); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if ((!(lengthOrWeight.equalsIgnoreCase("l")) &amp;&amp; (!(lengthOrWeight.equalsIgnoreCase("w"))))){ System.out.println("\nError: Unrecognized conversion type." + "\nProgram is now terminating."); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if (lengthOrWeight.equalsIgnoreCase("l")){ System.out.println("\nConverting feet or meters?"); System.out.print("Enter F to convert feet, or M for meters: "); whichLengthConversion = keyboard.nextLine(); } if (whichLengthConversion.length() &gt; 1 ) { System.out.println(maxInputWarning); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if ((!(whichLengthConversion.equalsIgnoreCase("f")) &amp;&amp; (!(whichLengthConversion.equalsIgnoreCase("m"))))){ System.out.println("\nError: Unrecognized unit of " + "measurement.\nProgram is now terminating." ); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if (whichLengthConversion.equalsIgnoreCase("f")){ System.out.print ("Enter the number of feet to" + " convert to meters: "); feet = keyboard.nextDouble(); feetConvertedToMeters = feet / LENGTH_CONVERSION_FACTOR; System.out.println("The number of meters in " + feet + " feet is " + feetConvertedToMeters + "."); keyboard.nextLine(); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if (whichLengthConversion.equalsIgnoreCase("m")){ System.out.print ("Enter the number of meters to" + " convert to feet: "); meters = keyboard.nextDouble(); metersConvertedToFeet = meters * LENGTH_CONVERSION_FACTOR; System.out.println("The number of feet in " + meters + " meters is " + metersConvertedToFeet + "."); keyboard.nextLine(); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } if (lengthOrWeight.equalsIgnoreCase("w")){ System.out.println("Converting pounds or kilograms?"); System.out.print("Enter P to convert pounds, or K for kilograms: "); whichWeightConversion = keyboard.nextLine(); } if (whichWeightConversion.length() &gt; 1 ) { System.out.println(maxInputWarning); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if ((!(whichWeightConversion.equalsIgnoreCase("p")) &amp;&amp; (!(whichWeightConversion.equalsIgnoreCase("k"))))){ System.out.println("\nError: Unrecognized unit of " + "measurement.\nProgram is now terminating." ); System.out.print("Press Enter to continue ... "); return; } else if (whichWeightConversion.equalsIgnoreCase("p")){ System.out.println("Enter the number of pounds to" + " convert to kilograms:"); pounds = keyboard.nextDouble(); poundsConvertedToKilograms = pounds / WEIGHT_CONVERSION_FACTOR; System.out.println("The number of pounds in " + kilograms + " kilograms is " + poundsConvertedToKilograms + "."); keyboard.nextLine(); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else if (whichLengthConversion.equalsIgnoreCase("k")){ System.out.print ("Enter the number of kilograms to" + " convert to pounds: "); kilograms = keyboard.nextDouble(); kilogramsConvertedToPounds = kilograms * WEIGHT_CONVERSION_FACTOR; System.out.println("The number of pounds in " + pounds + "pounds is " + kilogramsConvertedToPounds + "."); keyboard.nextLine(); System.out.print("Press Enter to continue ... "); keyboard.nextLine(); return; } else{ return; } } } </code></pre>
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    1. USuser465001
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    1. COJust a note that if you format your code more readably debugging will be much easier. Putting blank spaces can really help, and you can rewrite the `w` or `l` check as `if(!(lengthOrWeight.equalsIgnoreCase("l") || lengthOrWeight.equalsIgnoreCase("w")))`, which is a much more concise (and clear) way of putting that.
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      1. POI can't figure out my simple Java homework
      1. USIan Henry
    2. COIf you want more points, [try to not repeat yourself](http://en.wikipedia.org/wiki/Don%27t_repeat_yourself).
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      1. POI can't figure out my simple Java homework
      1. USBalusC
    3. COThanks. I feel like a moron for missing the || instead of &&. I definitely make my code more readable, too.
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      1. USuser465001
 

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