计算收到错误结果

Question

但是由于某种原因，当我运行我的程序时，它似乎没有完全接受输入，并且给我一个错误的答案，当按下按钮时，它给我的答案是179.0的男性和169.0的女性。

我看了一遍又一遍，似乎无法找出这个逻辑错误。这是我的代码。

public class MainHMR extends Activity implements View.OnClickListener {

Button chkCmd;
CheckBox Male, Femail;
EditText age, RestHeart;
TextView MaxHeart, TargetHeart;

int m = 220;
int f = 212;
int AgeResult =0, RestResultFinal =0, TargetHeartFinal =0;
double MaleResult, FemailResult;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main_hmr);
    Initilise();
    format();
    Male.setOnClickListener(this);
    Femail.setOnClickListener(this);
    chkCmd.setOnClickListener(this);

}

private void Initilise() {
    // TODO Auto-generated method stub
    /* Button */chkCmd = (Button) findViewById(R.id.bResults);
    /* checkBox */Male = (CheckBox) findViewById(R.id.cbM);
    /* checkBox */Femail = (CheckBox) findViewById(R.id.cbF);
    /* EditText */age = (EditText) findViewById(R.id.etAge);
    /* EditText */RestHeart = (EditText) findViewById(R.id.etRestHeart);
    /* TextView */TargetHeart = (TextView) findViewById(R.id.etTargetHeard);
}

private void format() {
    // TODO Auto-generated method stub

    String change = age.getText().toString();
    AgeResult = 0; // set it to 0 as the default
    try {
        AgeResult = Integer.parseInt(change);
        System.out.println(AgeResult);
    }
    catch (NumberFormatException e){}

    String changeTwo = RestHeart.getText().toString();
    RestResultFinal = 0; // set it to 0 as the default
    try {
        RestResultFinal = Integer.parseInt(changeTwo);
        System.out.println(RestResultFinal);
    }
    catch (NumberFormatException e){}
}

@Override
public void onClick(View v) {
    // TODO Auto-generated method stub

    switch(v.getId()){
    case R.id.bResults:
    if (Male.isChecked()) {
        int result = m - AgeResult;
        MaleResult = ((result - RestResultFinal) * 0.8);
        String finalResult = Double.toString(MaleResult);
        TargetHeart.setText(finalResult);
    } else if (Femail.isChecked()) {
        int result = f - AgeResult;
        FemailResult = (int) ((result - RestResultFinal) * 0.8);
        String finalResult = Double.toString(FemailResult);
        TargetHeart.setText(finalResult);
        break;
    }

}
}
}

Answer 1

好吧，我能理解如果你是176的男性和169的女性...但不是179。你确定吗？

我怀疑integer.parseint对您来说是失败的--但您无法判断，因为这一点：

catch (NumberFormatException e){}

永远不要只抓到一个例外而完全忽略它。至少要在那里登录。

// I've changed the names of some variables to comply with conventions
double maximumRate = MALE_MAXIMUM_RATE_LIMIT - parsedAge;
double targetRate = (maximumRate - parsedRestingRate) * 0.8;