用Java左键填充具有指定字符的字符串
以下是我们的字符串-
String str = "Amit";
现在拿一个StringBuilder对象-
StringBuilder strBuilder = new StringBuilder();
设置要用字符串填充的字符-
Character ch = '^';
执行左填充,并将字符串长度扩展为5(一个用于附加字符)。将要填充的字符在左侧-
while (strBuilder.length() + str.length() < 5) { strBuilder.append(ch); }
以下是一个例子-
示例
public class Demo { public static void main(String[] args) { String str = "Amit"; Character ch = '^'; StringBuilder strBuilder = new StringBuilder(); while (strBuilder.length() + str.length() < 5) { strBuilder.append(ch); } //附加 strBuilder.append(str); String res = strBuilder.toString(); System.out.println(res); } }
输出结果
^Amit