java - 没有空格的字符串

Question

这个问题已经有答案了:

Strip Leading and Trailing Spaces From Java String (8 个回答)

How to trim the whitespace from a string? [duplicate] (8 个回答)

已关闭 5 年前。

所以基本上我正在为我的 Android 应用程序创建一个测验。但是我注意到，当用户输入“愤怒”的正确答案并且旁边有一个空格时，答案会显示为错误。我想知道如何更改此设置，以便不包含答案后的空格？谢谢!

public void question3(View view) {

        // Get the typed answer by the user and convert it to lower case.
        EditText question3 = (EditText) findViewById(R.id.question3_typed); 

        String question3_answer = question3.getText().toString().toLowerCase();

        if (question3_answer.equals("angry")) {
            answer3 = "correct";
        } else answer3 = "wrong";

Answer 1

您应该使用String类的trim方法来删除字符串开头或结尾的任何空格。像这样修改你的代码

public void question3(View view) {

    // Get the typed answer by the user and convert it to lower case.
    EditText question3 = (EditText) findViewById(R.id.question3_typed); 

    String question3_answer = question3.getText().toString().trim().toLowerCase();

    if (question3_answer.equals("angry")) {
        answer3 = "correct";
    } else answer3 = "wrong";