模拟结婚

/**
 * 结婚
 * @author FuJianshi
 *
 */
public class Person {
	private String name;	//姓名
	private int age;		//年龄
	private String gender;	//性别
	private Person partner;	//配偶
	
	public Person(String name, int age, String gender) {
		super();
		this.name = name;
		this.age = age;
		this.gender = gender;
	}

	public void marry(Person p){
		System.out.println(this.name + "和" + p.name + "要结婚");
		//引用数据类型比较不用==  ，用equals
		if(this.gender.equals(p.gender)){
			System.out.println("他们两个是同性，不允许结婚!");
			return;
		}
		if("男".equals(this.gender) && age < 23 || 
				"女".equals(this.gender) && age < 20){
			System.out.println(this.name + "不到法定年龄!");
			return;
		}
		if("男".equals(p.gender) && p.age < 23 || "女".equals(p.gender) && p.age < 20){
			System.out.println(p.name + "不到法定年龄!");
			return;
		}
		if(this.partner != null){
			System.out.println(this.name + "已经结婚!");
			return;
		}
		if(p.partner != null){
			System.out.println(p.name + "已经结婚!");
			return;
		}
		
		this.partner = p;
		p.partner = this;
		System.out.println("你们两个可以结婚，祝你们百年好合");
	}

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public String getGender() {
		return gender;
	}

	public void setGender(String gender) {
		this.gender = gender;
	}

	public Person getPartner() {
		return partner;
	}

	public void setPartner(Person partner) {
		this.partner = partner;
	}
}

测试

public class PersonTest {
	public static void main(String[] args) {
		Person p1 = new Person("张三",23,"男");
		Person p2 = new Person("李四",23,"男");
		Person p3 = new Person("小红娘",20,"女");
		Person p4 = new Person("三娘",22,"女");
	
		p1.marry(p3);
		p1.marry(p4);
		p1.getPartner();
	}
}