使用 if 和 else 语句之外的字符串来设置字符串值

Question

关于我遇到的问题，我只是有一个足够简单的问题。我试图设置一个字符串值，"0"如果一个 webelement 不存在，否则字符串是 webelement 值（使用getText）。但是，我似乎无法在if 和 else语句之外使用这些值。我该怎么做呢？这是我的代码String players_in_game = null;public void join_game_user_increases_register() throws Exception {    WebDriverWait wait = new WebDriverWait(Drivers.getDriver(), 10);    wait.until(ExpectedConditions.visibilityOf(countdownLabel));    if (!num_of_players_in_game.isDisplayed()) {        String players_in_game = "0";    } else {        String players_in_game = num_of_players_in_game.getText();    }    System.out.println(players_in_game);    int first_num = Integer.parseInt(players_in_game);

Answer 1

使用下面的代码：

WebDriverWait wait = new WebDriverWait(Drivers.getDriver(), 10);

wait.until(ExpectedConditions.visibilityOf(countdownLabel));

String players_in_game = "0";

if(num_of_players_in_game.isDisplayed()){

   players_in_game = num_of_players_in_game.getText();   

}

System.out.println(players_in_game);

int first_num = Integer.parseInt(players_in_game);

或者：

String players_in_game = num_of_players_in_game.isDisplayed() ? num_of_players_in_game.getText() : "0";

或者：

List<WebElements> num_of_players_in_game = driver.findElements(By....);

String players_in_game = num_of_players_in_game.size()==0 ? "0": num_of_players_in_game.get(0).getText();

Answer 2

你可以试试这个：

String players_in_game = null;

public void join_game_user_increases_register() throws Exception {

WebDriverWait wait = new WebDriverWait(Drivers.getDriver(), 10);

wait.until(ExpectedConditions.visibilityOf(countdownLabel));

try {

    if (num_of_players_in_game.isDisplayed()) {

        String players_in_game = num_of_players_in_game.getText();

    }

} catch (Exception e) {

    String players_in_game = "0";

}

System.out.println(players_in_game);

int first_num = Integer.parseInt(players_in_game);

Answer 3

由于您已经在代码的第一行中将该变量声明为类成员，因此String只需删除即可不将该名称重新声明为局部变量，而是使用该字段：

if(!num_of_players_in_game.isDisplayed()){

    players_in_game = "0";

} else {

    players_in_game = num_of_players_in_game.getText();

}