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()){&nbsp; &nbsp;players_in_game = num_of_players_in_game.getText();&nbsp; &nbsp;}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 {&nbsp; &nbsp; if (num_of_players_in_game.isDisplayed()) {&nbsp; &nbsp; &nbsp; &nbsp; String players_in_game = num_of_players_in_game.getText();&nbsp; &nbsp; }} catch (Exception e) {&nbsp; &nbsp; 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()){&nbsp; &nbsp; players_in_game = "0";} else {&nbsp; &nbsp; players_in_game = num_of_players_in_game.getText();}