没有空格的字符串

Question

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键入正确的答案时，＃34;愤怒＆＃34;并且旁边有一个空格，答案显示为错误。我想知道我怎么能改变这个，以便答案后的空格不包括在内？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

你应该使用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";