0
因此，我创建了一个GUI，在该GUI中可以计算摩尔质量，质量或摩尔数，并且在调用我的方法时我似乎无法得到计算结果。我正在使用并行阵列，我想这可能是问题。顺便说一句，moleMass是全球性的，但我不知道如何在这里格式化。谢谢。程序不会返回数值
private void btnGoActionPerformed(java.awt.event.ActionEvent evt) {
int indexOfElements = cmbElements.getSelectedIndex();
Double numberOfMass = Double.parseDouble(txtInputMass.getText());
Double numberOfMoles = Double.parseDouble(txtInputMoles.getText());
if (chkMoles.isSelected()==true)
{
txtAnswer.setText(solveForMoles(numberOfMass).toString() + " mol");
}
else if (chkMolarMass.isSelected()==true)
{
txtAnswer.setText(solveForMolarMass(numberOfMass, numberOfMoles).toString() + "
g/mol");
}
else if (chkMass.isSelected()==true)
{
txtAnswer.setText(solveForMass(numberOfMoles).toString() + " g");
}
else
{
txtAnswer.setText ("Please make a selection");
}
private Double solveForMoles (double mass){
int indexOfElements = cmbElements.getSelectedIndex();
double numberOfMoles = mass/molarMass[indexOfElements];
return (Double.parseDouble (x.format(numberOfMoles)));
}
private Double solveForMass (double moles){
int indexOfElements = cmbElements.getSelectedIndex();
double numberOfMass = moles*molarMass[indexOfElements];
return (Double.parseDouble (x.format(numberOfMass)));
}
private Double solveForMolarMass (double masss, double moless){
double numberOfMolarMass = masss/moless;
return (Double.parseDouble(x.format (numberOfMolarMass)));
}