「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