java - 调试时的值相同，但 if 语句中的值不同

Question

这个问题已经有答案了:

How do I compare strings in Java? (23 个回答)

已关闭 5 年前。

我的 if 语句有问题。两个值 - 字符串，一个在类中通过 arrow 声明，另一个通过 radiobutton.gettext() 声明。在调试中我可以读取两个变量的值。它们是相同的，但如果声明说它们是不同的。您知道为什么会发生这种情况吗？

调试器: /image/jYrMV.jpg

获取rbAnswer:

private String mChoices [][] = {
    /* #8 */        {"razgovor između pomoraca u karanteni i njihovih obitelji", "za osobno razmatranje i razgovor s duhovnikom"," "," "},

}

...

public String getChoice1(int a) {
    String choice0 = mChoices[a][0];
    return choice0;
}


public String getChoice2(int a) {
    String choice1 = mChoices[a][1];
    return choice1;
}

...

rbGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
        String rbAnswer;

        public void onCheckedChanged(RadioGroup group, int checkedId) {
            if (checkedId == R.id.radiobtn1)
                rbAnswer = "" + rb1.getText();
            else if (checkedId == R.id.radiobtn2)
                rbAnswer =  "" +  rb2.getText();
            else if (checkedId == R.id.radiobtn3)
                rbAnswer = "" + rb3.getText();
            else if (checkedId == R.id.radiobtn4)
                rbAnswer = "" + rb4.getText();

            tTEST.setText(rbAnswer);
            if (rbAnswer == mAnswer) {
                varScoreTrue = varScoreTrue + 1;
                updateScore(varScoreTrue);
                obavijestTocno();
                updateQuestion();

            } else {
                varScoreFlase = varScoreFlase + 1;
                updateScore(varScoreFlase);
                obavijestKrivo();
                updateQuestion();
            }



        }

    });

声明mAnswer:

private String mCorrectAnswers[] = {

            ...

        /* #8 */        "za osobno razmatranje i razgovor s duhovnikom",


            ...
}

...

public String getCorrectAnswer(int a) {
    String answer = mCorrectAnswers[a];
    return answer;
}

...

mAnswer = mQuestionLibrary.getCorrectAnswer(mQuestionNumber);

Answer 1

您进行了错误的比较。

更改:

rbAnswer == mAnswer

到

rbAnswer.equals(mAnswer)