[Java]lengthで配列の要素の数を取得する
書式
配列名.length
使用例
package com.arkgame.study; public class ArrelemSample { public static void main(String[] args) { double[] dbArr = new double[4]; dbArr[0] = 6.124; dbArr[1] = 7.25; dbArr[2] = 56.375; dbArr[3] = 78.900; System.out.println("配列の要素数:" + dbArr.length); for (int i = 0; i < dbArr.length; i++) { System.out.println("dbArr[" + i + "] = " + dbArr[i]); } } }
実行結果
配列の要素数:4
dbArr[0] = 6.124
dbArr[1] = 7.25
dbArr[2] = 56.375
dbArr[3] = 78.9