Pair.java

package gr.gousiosg.javacg.dyn;

public class Pair<A, B> {

    public A first;
    public B second;
    
    public Pair(A first, B second) {
        this.first = first;
        this.second = second;
    }
    
    @Override
    public String toString() {
        StringBuffer b = new StringBuffer(first.toString());
        b.append(" ");
        b.append(second);
        return b.toString();
    }
    
    @Override
    public boolean equals(Object obj) {
        if (obj == null)
            return false;
        if (obj == this)
            return true;
        if (obj.getClass() != getClass())
            return false;

        Pair p = (Pair)obj;

        return first.equals(p.first) && second.equals(p.second);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 31 * hash + (null == first ? 0 : first.hashCode());
        hash = 31 * hash + (null == second ? 0 : second.hashCode());
        return hash;
    }
}