LinkedList搭配collections.sort做字符串排序。针对上文精简了方法的实现部分

最新推荐文章于 2024-11-10 20:11:08 发布

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本文介绍了一个使用Java实现的姓名比较器，通过实现Comparable接口来对具有名和姓的对象进行排序。示例代码展示了如何创建包含名字信息的类并实现compareTo方法以按姓氏和名字进行排序。

import java.util.*;
class Name implements Comparable{
	private String firstName, lastName;
	
	Name(String firstName, String lastName){
		this.firstName = firstName;
		this.lastName = lastName;
	}
	
	public String toString(){
		return firstName + " " + lastName;
	}
	
	public boolean equals(Object obj){
		Name na = (Name) obj;
		if(na.lastName == lastName && na.firstName == firstName){
			return true;
		}else{
			return false;
		}
	}
	public int compareTo(Object obj){
		Name na = (Name) obj;
		int strCmp = lastName.compareTo(na.lastName);
		if(strCmp != 0){
			return strCmp;
		}else return firstName.compareTo(na.firstName);
	}
}
public class TestComparalbe {

	public static void main(String[] args) {
		List ls = new LinkedList();
		ls.add(new Name("Karl", "M"));
		ls.add(new Name("Steven", "Lee"));
		ls.add(new Name("William", "AMG"));
		ls.add(new Name("Tom", "M"));
		
		System.out.println(ls);
		
		Collections.sort(ls);
		
		System.out.println(ls);

	}

}