containermethoddifferences.java

这个是Java编程的经典著作Think in Java的第四版的源码

//: net/mindview/util/ContainerMethodDifferences.java
package net.mindview.util;
import java.lang.reflect.*;
import java.util.*;

public class ContainerMethodDifferences {
  static Set<String> methodSet(Class<?> type) {
    Set<String> result = new TreeSet<String>();
    for(Method m : type.getMethods())
      result.add(m.getName());
    return result;
  }
  static void interfaces(Class<?> type) {
    System.out.print("Interfaces in " +
      type.getSimpleName() + ": ");
    List<String> result = new ArrayList<String>();
    for(Class<?> c : type.getInterfaces())
      result.add(c.getSimpleName());
    System.out.println(result);
  }
  static Set<String> object = methodSet(Object.class);
  static { object.add("clone"); }
  static void
  difference(Class<?> superset, Class<?> subset) {
    System.out.print(superset.getSimpleName() +
      " extends " + subset.getSimpleName() + ", adds: ");
    Set<String> comp = Sets.difference(
      methodSet(superset), methodSet(subset));
    comp.removeAll(object); // Don't show 'Object' methods
    System.out.println(comp);
    interfaces(superset);
  }
  public static void main(String[] args) {
    System.out.println("Collection: " +
      methodSet(Collection.class));
    interfaces(Collection.class);
    difference(Set.class, Collection.class);
    difference(HashSet.class, Set.class);
    difference(LinkedHashSet.class, HashSet.class);
    difference(TreeSet.class, Set.class);
    difference(List.class, Collection.class);
    difference(ArrayList.class, List.class);
    difference(LinkedList.class, List.class);
    difference(Queue.class, Collection.class);
    difference(PriorityQueue.class, Queue.class);
    System.out.println("Map: " + methodSet(Map.class));
    difference(HashMap.class, Map.class);
    difference(LinkedHashMap.class, HashMap.class);
    difference(SortedMap.class, Map.class);
    difference(TreeMap.class, Map.class);
  }
} ///:~