update,

_resources/it114105/itp4510/Lab01/Lab1.1/CommissionWorker.java

@@ -0,0 +1,30 @@
+public class CommissionWorker extends Worker{
+    private double commission;
+    private int quantity;
+
+    public CommissionWorker(String name, double c, int q) {
+        super(name);
+        setCommission(c);
+        setQuantity(q);
+    }
+
+    public void setCommission(double c) {
+        commission = c;
+    }
+
+    public void setQuantity(int q) {
+        quantity = q;
+    }
+
+    public double earnings() {
+        salary = commission * quantity;
+        return salary;
+    }
+
+    public String toString() {
+        return super.toString() + " earned commission of $" +
+
+                earnings();
+
+    }
+}

_resources/it114105/itp4510/Lab01/Lab1.1/HourlyWorker.java

@@ -0,0 +1,30 @@
+public class HourlyWorker extends Worker {
+    private double wage;
+    private double hours;
+
+    public HourlyWorker(String name, double w, double h) {
+        super(name);
+        setWage(w);
+        setHours(h);
+    }
+
+    public void setWage(double w) {
+        wage = w;
+    }
+
+    public void setHours(double h) {
+        hours = h;
+    }
+
+    public double earnings() {
+        salary = wage * hours;
+        return salary;
+    }
+
+    public String toString() {
+        return super.toString() + " earned $" + earnings() +
+
+                " for " + hours + " hours";
+
+    }
+}

_resources/it114105/itp4510/Lab01/Lab1.1/TestWorker.java

@@ -0,0 +1,10 @@
+public class TestWorker {
+    public static void main(String [] args) {
+        Worker [] w = new Worker[3];
+        w[0] = new Worker("Peter");
+        w[1] = new CommissionWorker("John", 120, 10);
+        w[2] = new HourlyWorker("Mary", 25, 40);
+        for( int i = 0; i < w.length; i++)
+            System.out.println(w[i]);
+    }
+}

_resources/it114105/itp4510/Lab01/Lab1.1/Worker.java

@@ -0,0 +1,16 @@
+public class Worker {
+    private String name;
+    protected double salary;
+
+    public Worker(String name) {
+        this.name = name;
+    }
+
+    public double earnings() {
+        return salary;
+    }
+
+    public String toString() {
+        return name;
+    }
+}