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1
import java.util.List;2
import java.util.ArrayList;3
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public class SortTest1 {5
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public static void main(String[] args) {7
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List<Person> people = new ArrayList<>();9
people.add(new Person("Alice", 30));10
people.add(new Person("Bob", 19));11
people.add(new Person("Ronald", 40));12
people.add(new Person("Jimi", 27));13
people.add(new Person("Suzan", 60));14
people.add(new Person("Jeff", 80));15
people.add(new Person("Maria", 52));16
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// sort by name18
people.sort((p1, p2)->p1.getName().compareTo(p2.getName()));19
System.out.println(people);20
// [name:Alice age:30, name:Bob age:19, name:Jeff age:80, name:Jimi age:27, name:Maria age:52, name:Ronald age:40, name:Suzan age:60]21
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// sort by age23
people.sort((p1, p2)->p1.getAge().compareTo(p2.getAge()));24
System.out.println(people);25
// [name:Bob age:19, name:Jimi age:27, name:Alice age:30, name:Ronald age:40, name:Maria age:52, name:Suzan age:60, name:Jeff age:80]26
27
}28
}29
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class Person {31
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private String name;33
private Integer age;34
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public Person(String name, Integer age) {36
this.name = name;37
this.age = age;38
}39
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public Integer getAge() {41
return age;42
}43
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public String getName() {45
return name;46
}47
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public String toString() {49
return "name:" + name + " age:" + age;50
}51