查看“︁Java Record”︁的源代码


<syntaxhighlight lang="java">
public class Test {
    record Person(String firstName, String lastName, int age) {

    }
    public static void main(String[] args) {
        var me = new Person("Riguz", "Lee", 20);
        System.out.println(me);
    }
}
</syntaxhighlight>

Output:
<syntaxhighlight lang="java">
Person[firstName=Riguz, lastName=Lee, age=20]
</syntaxhighlight>

* Record是不可变对象
* 自动实现了构造方法，equlas，hashcode，toString
* 可以实现接口、添加方法
* 可以添加构造器的检测：
<syntaxhighlight lang="java">
public class Test {
    record Person(String firstName, String lastName, int age) {
        public Person {
            if(age < 0 || age > 100)
                throw new IllegalArgumentException("Age is invalid");
        }
    }
}
</syntaxhighlight>

[[Category:Java]]