代碼片段(1)
[代碼] [Java]代碼
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import java.util.ArrayList; |
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import java.util.Collections; |
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import java.util.Comparator; |
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public class ArrayListSort
{ |
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public static void main(String[]
args) { |
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ArrayList<Person>
persons = new ArrayList<Person>(); |
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Person
zhangsan = new Person("zhangsan", 20, true); |
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Person
lisi = new Person("lisi", 21, true); |
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Person
wangwu = new Person("wangwu", 18, false); |
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persons.add(zhangsan); |
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persons.add(lisi); |
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persons.add(wangwu); |
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Collections.sort(persons, new Comparator<Person>()
{ |
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@Override |
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public int compare(Person
o1, Person o2) { |
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if (o1
!= null &&
o2 != null)
{ |
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if (o1.getAge()
> o2.getAge()) { |
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return 1; |
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} else if (o1.getAge()
< o2.getAge()) { |
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return -1; |
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} |
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} |
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return 0; |
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} |
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}); |
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for (Person
p : persons) { |
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System.out.println(p); |
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} |
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} |
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} |
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class Person
{ |
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private String
name; |
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private int age; |
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private boolean sex; |
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public Person()
{ |
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} |
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public Person(String
name, int age, boolean sex)
{ |
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this.name
= name; |
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this.age
= age; |
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this.sex
= sex; |
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} |
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public String
getName() { |
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return name; |
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} |
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public void setName(String
name) { |
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this.name
= name; |
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} |
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public int getAge()
{ |
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return age; |
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} |
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public void setAge(int age)
{ |
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this.age
= age; |
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} |
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public boolean isSex()
{ |
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return sex; |
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} |
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public void setSex(boolean sex)
{ |
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this.sex
= sex; |
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} |
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@Override |
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public String
toString() { |
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return "name=" +
name + "\tage=" +
age + "\tsex" +
sex; |
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} |
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} |