Java参数校验抛出IllegalArgException方法详解

public void setAge(int age) {
    if (age  150) {
        throw new IllegalArgumentException("年龄必须在0到150之间，实际值：" + age);
    }
    this.age = age;
}

// 校验对象非null
public void processUser(User user) {
    if (user == null) {
        throw new IllegalArgumentException("用户对象不能为null");
    }
    // 处理逻辑
}

// 校验字符串非空
public void setName(String name) {
    if (name == null || name.trim().isEmpty()) {
        throw new IllegalArgumentException("姓名不能为空");
    }
    this.name = name.trim();
}

// 校验集合非空
public void addScores(List<integer> scores) {
    if (scores == null || scores.isEmpty()) {
        throw new IllegalArgumentException("成绩列表不能为空");
    }
    this.scores.addAll(scores);
}
</integer>

import java.util.Objects;

public void setEmail(String email) {
    Objects.requireNonNull(email, "邮箱地址不能为null");
    if (!email.contains("@")) {
        throw new IllegalArgumentException("邮箱格式不正确: " + email);
    }
    this.email = email;
}