System.out.print(p1+"与"+o+"是否为同一

public class People {
int id;// 身份证号
String name;//名字

public People(int id, String name) {
    this.id = id;
    this.name = name;
}

public boolean equals(Object obj) {// 重写Object的equals()方法
    if (this == obj)// 如果参数与本类是同一个对象
        return true;
    if (obj == null)// 如果参数是null
        return false;
    if (getClass() != obj.getClass())// 如果参数与本类类型不同
        return false;
    People other = (People) obj;// 将参数强转成本类对象
    if (id != other.id)// 如果两者的身份证号不相等
        return false;
    return true;
}

public String toString() {// 重写Object的toString()方法
    return  name;//只输出名字
}

public static void main(String[] args) {
    People p1 = new People(220, "tom");
    People p2 = new People(220, "汤姆");
    People p3 = new People(330, "张三");
    Object o = new Object();
    
    System.out.println(p1+"与"+p2+"是否为同一人？");
    System.out.println("equals()方法的结果："+p1.equals(p2));
    System.out.println("==运算符的结果："+(p1 == p2));
    
    System.out.println();
    System.out.print(p1+"与"+p3+"是否为同一人？");
    System.out.println(p1.equals(p3));
    
    System.out.print(p1+"与"+o+"是否为同一人？");
    System.out.println(p1.equals(o));
}

}