3.3 测试TreeSet

TreeSetUnit.java

package com.zj.sort.comparator; import java.util.TreeSet; public class TreeSetUnit { 　　public static void main(String[] args) { 　　　 TreeSet<Person> firstNameSet = new TreeSet<Person>( 　　　　　　　new FirstNameComparator()); 　　　 firstNameSet.add(new Person(20, "Tom", "A")); 　　　 firstNameSet.add(new Person(20, "Jeff", "A")); 　　　 firstNameSet.add(new Person(30, "Mary", "A")); 　　　 firstNameSet.add(new Person(20, "Ada", "B")); 　　　 firstNameSet.add(new Person(40, "Walton", "B")); 　　　 firstNameSet.add(new Person(61, "Peter", "B")); 　　　 firstNameSet.add(new Person(20, "Bush", "B")); 　　　 System.out.println(firstNameSet); 　　　 TreeSet<Person> lastNameSet = new TreeSet<Person>( 　　　　　　　new LastNameComparator()); 　　　 lastNameSet.addAll(firstNameSet); 　　　 System.out.println(lastNameSet); 　　} }

结果：

[20{Ada B}, 20{Bush B}, 20{Jeff A}, 30{Mary A}, 61{Peter B}, 20{Tom A}, 40{Walton B}] [20{Jeff A}, 30{Mary A}, 20{Tom A}, 20{Ada B}, 20{Bush B}, 61{Peter B}, 40{Walton B}]

Java:±è??ó???Dò(6)

3.4 2aê?TreeMap

TreeMapUnit.java

package com.zj.sort.comparator; import java.util.TreeMap; public class TreeMapUnit { ????public static void main(String[] args) { ?????? TreeMap<Person, String> firstNameMap = new TreeMap<Person, String>( ??????????????new FirstNameComparator()); ?????? firstNameMap.put(new Person(20, "Tom", "A"), "Tom A"); ?????? firstNameMap.put(new Person(20, "Jeff", "A"), "Jeff A"); ?????? firstNameMap.put(new Person(30, "Mary", "A"), "Mary A"); ?????? firstNameMap.put(new Person(20, "Ada", "B"), "Ada B"); ?????? firstNameMap.put(new Person(40, "Walton", "B"), "Walton B"); ?????? firstNameMap.put(new Person(61, "Peter", "B"), "Peter B"); ?????? firstNameMap.put(new Person(20, "Bush", "B"), "Bush B"); ?????? System.out.println(firstNameMap); ?????? TreeMap<Person, String> lastNameMap = new TreeMap<Person, String>( ??????????????new LastNameComparator()); ?????? lastNameMap.putAll(firstNameMap); ?????? System.out.println(lastNameMap); ????} }

?á1?￡o

{20{Ada B}=Ada B, 20{Bush B}=Bush B, 20{Jeff A}=Jeff A, 30{Mary A}=Mary A, 61{Peter B}=Peter B, 20{Tom A}=Tom A, 40{Walton B}=Walton B} {20{Jeff A}=Jeff A, 30{Mary A}=Mary A, 20{Tom A}=Tom A, 20{Ada B}=Ada B, 20{Bush B}=Bush B, 61{Peter B}=Peter B, 40{

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