new commit

ConversionTool.java

 public class ConversionTool {
 
-
     public static void main(String[] args){}
-
     public static float CentimetersToInches(float centimeters){
-    return centimeters * (float)0.393701;
+        if (centimeters <= 0){
+            return 0;
+        }else {
+            return centimeters * (float)0.393701;
+        }
     }
 
     public static float InchesToCentimeters(float inches){
-        return inches * (float)2.54;
-    
+        if (inches <= 0){
+            return 0;
+        }else {
+            return inches * (float)2.54;
+        }
+
     }
 
     public static float FeetToMeters(float feet){
-    return feet * (float)0.3048;
+        if (feet <= 0){
+            return 0;
+        }else {
+            return feet * (float)0.3048;
+        }
+
     }
 
     public static float MetersToFeet(float meters){
-    return meters * (float)3.28084;
+        if (meters <= 0){
+            return 0;
+        }else {
+            return meters * (float)3.28084;
+        }
+
     }
 
     public static float CelsiusToFahrenheit(float celsius){
-    return celsius + (float)32;
+        return celsius*9/5 + (float)32.0;
     }
 
     public static float FahrenheitToCelsius(float fahrenheit){
-    return fahrenheit - (float)32;
+        return (fahrenheit - (float)32.0) * 5/9;
     }
 
     public static float MphToKph(float mph){
-    return mph * (float)1.60934;
+        if (mph <= 0){
+            return 0;
+        }else {
+            return mph * (float)1.60934;
+        }
     }
 
     public static float KphToMph(float kph){
-    return kph * (float)0.621371;
+        if (kph <= 0){
+            return 0;
+        }else {
+            return kph * (float)0.621371;
+        }
     }
 }

ConversionToolSpec.ctxt

+#BlueJ class context
+comment0.target=ConversionToolSpec
+comment1.params=
+comment1.target=void\ shouldConvertCentimetersToInches()
+comment10.params=
+comment10.target=void\ shouldConvertMetersToFeet()
+comment11.params=
+comment11.target=void\ shouldConvertZeroMetersToZeroFeet()
+comment12.params=
+comment12.target=void\ shouldConvertNegativeMetersToZeroFeet()
+comment13.params=
+comment13.target=void\ shouldConvertFahrenheitToCelsius()
+comment14.params=
+comment14.target=void\ shouldConvertCelsiusToFahrenheit()
+comment15.params=
+comment15.target=void\ shouldConvertMphToKph()
+comment16.params=
+comment16.target=void\ shouldConvertZeroMphToZeroKph()
+comment17.params=
+comment17.target=void\ shouldConvertNegativeMphToZeroKph()
+comment18.params=
+comment18.target=void\ shouldConvertKphToMph()
+comment19.params=
+comment19.target=void\ shouldConvertZeroKphToZeroMph()
+comment2.params=
+comment2.target=void\ shouldConvertZeroCentimetersToZeroInches()
+comment20.params=
+comment20.target=void\ shouldConvertNegativeKphToZeroMph()
+comment3.params=
+comment3.target=void\ shouldConvertNegativeCentimetersToZeroInches()
+comment4.params=
+comment4.target=void\ shouldConvertInchesToCentimeters()
+comment5.params=
+comment5.target=void\ shouldConvertZeroInchesToZeroCentimeters()
+comment6.params=
+comment6.target=void\ shouldConvertNegativeInchesToZeroCentimeters()
+comment7.params=
+comment7.target=void\ shouldConvertFeetToMeters()
+comment8.params=
+comment8.target=void\ shouldConvertZeroFeetToZeroMeters()
+comment9.params=
+comment9.target=void\ shouldConvertNegativeFeetToZeroMeters()
+numComments=21

package.bluej

 dependency1.type=UsesDependency
 editor.fx.0.height=722
 editor.fx.0.width=800
-editor.fx.0.x=480
+editor.fx.0.x=521
 editor.fx.0.y=23
 objectbench.height=165
 objectbench.width=776
 target1.height=50
 target1.name=ConversionToolSpec
 target1.showInterface=false
-target1.type=ClassTarget
+target1.type=UnitTestTargetJunit4
 target1.width=150
 target1.x=130
 target1.y=10