java 可变个数形参

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();
    }
}

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