10 of 20 tests pass

src/Lfraction.java

@@ -10,28 +10,33 @@ public class Lfraction implements Comparable<Lfraction> {
       // TODO!!! Your debugging tests here
    }
 
-   // TODO!!! instance variables here
+   private long nu;
+   private long de;
 
    /** Constructor.
     * @param a numerator
     * @param b denominator > 0
     */
    public Lfraction (long a, long b) {
-      // TODO!!!
+      if (b < 1) {
+         throw new RuntimeException("Denominator can't be 0 or less");
+      }
+      this.nu = a;
+      this.de = b;
    }
 
    /** Public method to access the numerator field. 
     * @return numerator
     */
    public long getNumerator() {
-      return 0L; // TODO!!!
+      return this.nu;
    }
 
    /** Public method to access the denominator field. 
     * @return denominator
     */
    public long getDenominator() { 
-      return 1L; // TODO!!!
+      return this.de;
    }
 
    /** Conversion to string.
@@ -39,7 +44,7 @@ public class Lfraction implements Comparable<Lfraction> {
     */
    @Override
    public String toString() {
-      return null; // TODO!!!
+      return ""+Long.toString(this.nu)+"/"+Long.toString(this.de);
    }
 
    /** Equality test.
@@ -48,7 +53,21 @@ public class Lfraction implements Comparable<Lfraction> {
     */
    @Override
    public boolean equals (Object m) {
-      return false; // TODO!!!
+      Lfraction other = (Lfraction) m;
+      if (other.de == this.de) {
+         return this.nu == other.nu;
+      } else {
+         double dif;
+         if (other.de > this.de) {
+            dif = other.de / this.de;
+         } else {
+            dif = this.de / other.de;
+         }
+
+         System.out.println("dif = " + dif);
+         return (this.nu*dif) == other.nu;
+      }
+
    }
 
    /** Hashcode has to be equal for equal fractions.
@@ -79,7 +98,12 @@ public class Lfraction implements Comparable<Lfraction> {
     * @return inverse of this fraction: 1/this
     */
    public Lfraction inverse() {
-      return null; // TODO!!!
+      if (this.nu < 1) {
+         return new Lfraction(-this.de, -this.nu);
+      } else {
+         return new Lfraction(this.de, this.nu);
+      }
+
    }
 
    /** Opposite of the fraction. n/d becomes -n/d.
@@ -119,14 +143,14 @@ public class Lfraction implements Comparable<Lfraction> {
     */
    @Override
    public Object clone() throws CloneNotSupportedException {
-      return null; // TODO!!!
+      return new Lfraction(this.nu, this.de);
    }
 
    /** Integer part of the (improper) fraction. 
     * @return integer part of this fraction
     */
    public long integerPart() {
-      return 0L; // TODO!!!
+      return this.nu/this.de;
    }
 
    /** Extract fraction part of the (improper) fraction
@@ -141,7 +165,7 @@ public class Lfraction implements Comparable<Lfraction> {
     * @return numeric value of this fraction
     */
    public double toDouble() {
-      return 0.; // TODO!!!
+      return new Double(this.nu)/this.de;
    }
 
    /** Double value f presented as a fraction with denominator d > 0.
@@ -159,7 +183,7 @@ public class Lfraction implements Comparable<Lfraction> {
     * @return fraction represented by s
     */
    public static Lfraction valueOf (String s) {
-      return null; // TODO!!!
+      String[] parts = s.split("/");
+      return new Lfraction(Long.parseLong(parts[0]), Long.parseLong(parts[1]));
    }
-}
-
+}