Code for use in lecture

src/main/java/lecture8/HashCode.java

+package lecture8;
+
+public class HashCode {
+
+	public static void main(String[] args) {
+		Pair p1 = new Pair(1, 4);
+		Pair p2 = new Pair(1, 4);
+		System.out.println(p1.equals(p2));
+	}
+}
+
+class Pair{
+	private int a;
+	private int b;
+	
+	public Pair(int a, int b) {
+		this.a = a;
+		this.b = b;
+	}
+	public int getA() {
+		return a;
+	}
+	public void setA(int a) {
+		this.a = a;
+	}
+	public int getB() {
+		return b;
+	}
+	public void setB(int b) {
+		this.b = b;
+	}
+
+	@Override
+	public boolean equals(Object obj) {
+		if (this == obj)
+			return true;
+		if (obj == null)
+			return false;
+		if (obj instanceof Pair) {
+			Pair other = (Pair) obj;
+			return a == other.a && b == other.b;
+		}
+		else{
+			return false;
+		}
+	}
+	
+	@Override
+	public String toString() {
+		return "("+a+","+b+")";
+	}
+}
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