Question

我正在尝试创建一个注册系统。我有6个复选框，我想要发生的是如果我选中其中一个复选框并按下按钮计算，它应该给标签值2640.当我点击另一个复选框并按下按钮再次计算值如果我点击所有6个复选框，标签是5280，依此类推。

如果没有点击一个复选框并按下计算按钮，它应该从当前总数中减去2640。这是我的代码：

if (chkPLF.isSelected() == true) {
    tFee = 2640;
    lblMis.setText(Double.toString(misFee));
    lblT.setText(Double.toString(tFee + tFee));

    if (chkPLF.isSelected() == false) {
        tFee = tFee - 2640;
        lblMis.setText(Double.toString(misFee));
        lblT.setText(Double.toString(tFee));
    }
}
if (chkSAD.isSelected() == true) {
    tFee = 2640 * 3;
    lblMis.setText(Double.toString(misFee));
    lblT.setText(Double.toString(tFee));

    if (chkSAD.isSelected() == false) {
        tFee = tFee - 2640;
        lblMis.setText(Double.toString(misFee));
        lblT.setText(Double.toString(tFee));
    }
}

它只显示当前值但不减去。请帮助！

Answer 1

double amount = 0;
int    sel = 0;
if(jCheckBox1.isSelected()) sel++;
if(jCheckBox2.isSelected()) sel++;
if(jCheckBox3.isSelected()) sel++;
if(jCheckBox4.isSelected()) sel++;
if(jCheckBox5.isSelected()) sel++;
if(jCheckBox6.isSelected()) sel++;
amount = 2640 * sel;
JOptionPane.showMessageDialog(rootPane, String.valueOf(amount));

将此代码放入“计算”中点击ActionListener

Answer 2

为什么不计算点击结果的复数的数量是2640的结果。现在，你似乎用每个复选框覆盖了结果......

例如......

int checkCount = 0;
if (chk1.isSelected()) {
    checkCount++;
}
if (chk2.isSelected()) {
    checkCount++;
}    
if (chk3.isSelected()) {
    checkCount++;
}    
if (chk4.isSelected()) {
    checkCount++;
}    
if (chk5.isSelected()) {
    checkCount++;
}    
if (chk6.isSelected()) {
    checkCount++;
}

tFee = 2640 * checkCount;
lblMis.setText(Double.toString(misFee));
lblT.setText(Double.toString(tFee));

现在，我要走了，这可以通过循环轻松完成......

JCheckBox[] boxes = new JCheckBox[]{chk1, chk2, chk3, chk4, chk5, chk6};
tFee = 0;
for (JCheckBox box : boxes) {
    if (box.isSelected()) {
        tFee += 2640;
    }
}
lblMis.setText(Double.toString(misFee));
lblT.setText(Double.toString(tFee));

但也许那是因为我疯了......

使用复选框添加值？

2 个答案: