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lpetzo |
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package tools; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import javax.swing.JComponent; |
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import javax.swing.JMenuItem; |
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/** |
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* Simple data structure for the storage of two object of arbitrary types in a |
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* pair. This class is inspired by the STL utility class <code>pair</code>. |
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* @author Lars Petzold |
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* |
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* @param <F> type of the first object |
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* @param <S> type of the second object |
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*/ |
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public class Pair<F,S> { |
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F first; |
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S second; |
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/** |
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* Create a new pair. |
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* @param first the first object |
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* @param second the secon object |
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*/ |
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public Pair(F first, S second) { |
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this.first = first; |
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this.second = second; |
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} |
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/** |
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* Gets the F type object. |
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* @return the first object |
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*/ |
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public F getFirst() { |
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return first; |
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} |
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/** |
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* Gets the S type object. |
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* @return the second object |
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*/ |
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public S getSecond() { |
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return second; |
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} |
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/** |
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* Sets the F type object. |
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* @param first the first object |
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*/ |
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public void setFirst(F first) { |
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this.first = first; |
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} |
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/** |
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* Sets the S type object. |
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* @param second the second object |
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*/ |
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public void setSecond(S second) { |
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this.second = second; |
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} |
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/** |
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* Gets the string representation of the pair which is the comma-separated |
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* string representation of the types F and S encapsulated in squared |
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* brackets. |
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* @return the Pair's string representation |
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*/ |
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public String toString() { |
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return "[" + first.toString() + "," + second.toString() + "]"; |
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} |
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public static void main(String args[]) { |
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HashSet<Pair<Integer,Integer>> h1 = new HashSet<Pair<Integer,Integer>>(); |
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h1.add(new Pair<Integer, Integer>(1,2)); |
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h1.add(new Pair<Integer, Integer>(4,2)); |
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JMenuItem m1 = new JMenuItem(); |
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JMenuItem m2 = new JMenuItem(); |
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JMenuItem m3 = new JMenuItem(); |
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HashSet<Pair<JComponent, Boolean>> h2 = new HashSet<Pair<JComponent, Boolean>>(); |
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h2.add(new Pair<JComponent, Boolean>(m1,true)); |
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h2.add(new Pair<JComponent, Boolean>(m2,true)); |
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h2.add(new Pair<JComponent, Boolean>(m3,false)); |
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HashMap<JComponent,Boolean> h3 = new HashMap<JComponent, Boolean>(); |
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h3.put(m1,true); |
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h3.put(m2,true); |
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h3.put(m3,false); |
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} |
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} |
