java 可变个数形参

Posted 2022-11-29 DQ_CODING

概念

案例

package lesson.l10_oop;

/**
 * Illustration
 *
 * @author DengQing
 * @version 1.0
 * @datetime 2022/7/1 14:53
 * @function 可变个数形参
 */
public class ChangeableFormalParameter 
    public static void main(String[] args) 
        ChangeableFormalParameter parameter = new ChangeableFormalParameter();
        parameter.print("aa");
        parameter.print("aa", "bb");
//    也可以这样写
        parameter.print(new String[]"aa", "bb");
        parameter.print(0, "bb", "cc", "dd");
    

    public void print(String str) 
        System.out.println(str);
    

    public void print(String... strs) 
        for (int i = 0; i < strs.length; i++) 
            System.out.print(strs[i] + "\\t");
        
        System.out.println();
    
/*    public void print(String[]strs)
      public void print(String... strs) 
      这两个是一样的
 */
    public void print(int i, String... strs) 
        System.out.println(i);
        for (String s :
                strs) 
            System.out.print(s + "\\t");
        
        System.out.println();