如何在java中返回两个参数

发布时间：2020-12-15 05:13:38 所属栏目：Java 来源：网络整理

导读：参见英文答案 Is it possible to return more than one value from a method in Java? ????????????????????????????????????6个我想打印一个人的名字和姓氏.问题是如何返回名字和姓氏.以下是我的代码. package methodbasics;import java.util.Scanner;publ

参见英文答案 > Is it possible to return more than one value from a method in Java? ????????????????????????????????????6个
我想打印一个人的名字和姓氏.问题是如何返回名字和姓氏.以下是我的代码.

package methodbasics;
import java.util.Scanner;

public class MethodBasics {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        System.out.print("Enter Your FName :");
        String firstName = input.nextLine();
        System.out.print("Enter Your LName :");
        String lastName = input.nextLine();
        System.out.printf("Welcome %s %s!!!n",printName(firstName,lastName));
    }

    public static String printName(String firstName,String lastName){          
        return firstName,lastName; 
    }
}

解决方法

>例如,使用Container类

public class FirstAndLastName {
    String firstName;
    String lastName;
    ... // constructor and getter/setter
}
public static FirstAndLastName printName(String firstName,String lastName) {
    return new FirstAndLastName(firstName,lastName); 
}
public static void main(String[] args) {
    ...
    FirstAndLastName firstAndLastName = printName(firstName,lastName);
    ... firstAndLastName.getFirstName();

>例如,使用List或数组

public static List<String> printName(String firstName,String lastName) {          
    return Arrays.asList(firstName,lastName); 
}
private static final int FIRST_NAME = 0;...
public static void main(String[] args) {
    ...
    List list = printName(firstName,lastName);
    ... list.get(0)...list.get(FIRST_NAME);

要么

public static String[] printName(String firstName,String lastName) {          
    return new String[] {firstName,lastName}; 
}
private static final int FIRST_NAME = 0;...
public static void main(String[] args) {
    ...
    String[] array = printName(firstName,lastName);
    ... array[0]...array[FIRST_NAME];

>例如,使用Map

public static Map<String,String> printName(String firstName,String lastName) {  
    Map<String,String> result = new HashMap<>(2);
    result.put("firstName",firstName);           
    result.put("lastName",lastName);
    return result; 
}
public static void main(String[] args) {
    ...
    Map map = printName(firstName,lastName);
    ... map.get("firstName")...map.get("lastName");

（编辑：李大同）

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