Work on the example.

private-class-data/src/main/java/com/iluwatar/App.java

@@ -3,5 +3,9 @@ package com.iluwatar;
 public class App {
 	
     public static void main( String[] args ) {
+    	Stew stew = new Stew(1, 2, 3, 4);
+    	stew.mix();
+    	stew.taste();
+    	stew.mix();
     }
 }

private-class-data/src/main/java/com/iluwatar/Stew.java

@@ -0,0 +1,37 @@
+package com.iluwatar;
+
+public class Stew {
+	
+	private int numPotatoes;
+	private int numCarrots;
+	private int numMeat;
+	private int numPeppers;
+	
+	public Stew(int numPotatoes, int numCarrots, int numMeat, int numPeppers) {
+				this.numPotatoes = numPotatoes;
+				this.numCarrots = numCarrots;
+				this.numMeat = numMeat;
+				this.numPeppers = numPeppers;
+	}
+	
+	public void mix() {
+		System.out.println(String.format("Mixing the stew we find: %d potatoes, %d carrots, %d meat and %d peppers",
+				numPotatoes, numCarrots, numMeat, numPeppers));
+	}
+	
+	public void taste() {
+		System.out.println("Tasting the stew");
+		if (numPotatoes > 0) { 
+			numPotatoes--; 
+		}
+		if (numCarrots > 0) { 
+			numCarrots--; 
+		}
+		if (numMeat > 0) { 
+			numMeat--; 
+		}
+		if (numPeppers > 0) { 
+			numPeppers--; 
+		}
+	}
+}