「Java」StringBuilder.append()で文字列を追加する
書式
StringBuilder 変数名 = new StringBuilder(文字列);
変数名.append(追加文字列");
使用例
package com.arkgame.study; public class AppendDemo { public static void main(String[] args) { StringBuilder cft = new StringBuilder("tokyo"); cft.append("2020"); System.out.println(cft.toString()); StringBuffer sr = new StringBuffer(" hello world "); cft.append(sr); System.out.println(cft.toString()); boolean bn = false; cft.append(bn); System.out.println(cft.toString()); double dd = 23456.01; cft.append(dd); System.out.println(cft.toString()); char ch = '2'; cft.append(ch); System.out.println(cft.toString()); char[] cA = { 'b', 'c' }; cft.append(cA); System.out.println(cft.toString()); } }
結果
tokyo2020 tokyo2020 hello world tokyo2020 hello world false tokyo2020 hello world false23456.01 tokyo2020 hello world false23456.012 tokyo2020 hello world false23456.012bc