从字符串中获取字符串后的字符串

string = "这是一个字符串"
substring = "一个"
index = string.find(substring)
if index != -1:
    result = string[index + len(substring):]
    print(result)

let string = "这是一个字符串";
let substring = "一个";
let index = string.indexOf(substring);
if (index !== -1) {
    let result = string.slice(index + substring.length);
    console.log(result);
}

String string = "这是一个字符串";
String substring = "一个";
int index = string.indexOf(substring);
if (index !== -1) {
    String result = string.substring(index + substring.length());
    System.out.println(result);
}

string str = "这是一个字符串";
string subStr = "一个";
int index = str.IndexOf(subStr);
if (index !== -1) {
    string result = str.Substring(index + subStr.Length);
    Console.WriteLine(result);
}