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