将字符串数组列表存储到双数组列表中? [英] storing a string arraylist into a double arraylist?

查看：28
本文介绍了将字符串数组列表存储到双数组列表中?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个带有 ["51,073","51,074","51,073"] 之类数字的字符串数组列表，现在我想将其转换为 Double ArrayList 并计算数组列表中数字的总和.

代码如下:

私有ArrayList总计 = 新的 ArrayList<>();私有 ArrayListdemototal = new ArrayList<>();String total = itemData.getString(ParseBarcode.KEY_TOTAL);totals.add(total);/* 将 totals 数组中的所有值转换为 Double 并添加到 arraylist demototal*/for (int i = 0; i < totals.size(); i++) {最终字符串值 = totals.get(i);double total_ary = Double.parseDouble(value);demototal.add(total_ary);}String amount = ""+setArrayListElement(demototal);textViewSum.setText(amount);//设置总文本为amount//这里计算数量我们将setArrayListElement作为Double arraylist传递私人双 setArrayListElement(ArrayList inArray) {双倍量=0.0d；for (int i = 0; i < inArray.size(); i++) {数量 = 数量 + Double.valueOf((Double) inArray.get(i));}返还金额；}

这给了我 java.lang.NumberFormatException: Invalid double: "51,073" 异常.

<块引用>

为了更清晰，我添加了更多代码.

 private void showItem(String json) {String itembarcode = "";字符串 itemdesc = "";字符串重量 = "";字符串率 = "";字符串制作 = "";字符串 netrate = "";字符串总数 = "";尝试 {JSONObject jsonObject = new JSONObject(json);JSONArray 结果 = jsonObject.getJSONArray(ParseBarcode.JSON_ARRAY);JSONObject itemData = result.getJSONObject(0);itembarcode = itemData.getString(ParseBarcode.KEY_BARCODE);itemdesc = itemData.getString(ParseBarcode.KEY_DESC);重量 = itemData.getString(ParseBarcode.KEY_WEIGHT);rate = itemData.getString(ParseBarcode.KEY_RATE);制作 = itemData.getString(ParseBarcode.KEY_MAKING);netrate = itemData.getString(ParseBarcode.KEY_NETRATE);总计 = itemData.getString(ParseBarcode.KEY_TOTAL);} catch (JSONException e) {e.printStackTrace();}//表开始TableLayout.LayoutParams tableParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT);TableRow.LayoutParams rowParams = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 1f);rowParams.setMargins(16, 0, 16, 0);TableLayout tableLayout = new TableLayout(AddInvEst.this);tableLayout.setLayoutParams(tableParams);TableRow newRow = new TableRow(AddInvEst.this);newRow.setLayoutParams(tableParams);barCode = new TextView(AddInvEst.this);barCode.setLayoutParams(rowParams);barCode.setGravity(Gravity.CENTER);itemDesc = new TextView(AddInvEst.this);itemDesc.setLayoutParams(rowParams);itemDesc.setGravity(Gravity.CENTER);weightLine = new TextView(AddInvEst.this);weightLine.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.75f));weightLine.setGravity(Gravity.CENTER);rateAmount = new EditText(AddInvEst.this);rateAmount.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));rateAmount.setGravity(Gravity.CENTER);rateAmount.addTextChangedListener(rateTextWatcher);MakingAmount = new EditText(AddInvEst.this);MakingAmount.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));制作Amount.setGravity(Gravity.CENTER);MakingAmount.addTextChangedListener(mkAmountTextWatcher);netRate = new TextView(AddInvEst.this);netRate.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));netRate.setGravity(Gravity.CENTER);netrates.add(netrate);itemtotal = new TextView(AddInvEst.this);itemtotal.setLayoutParams(rowParams);itemtotal.setGravity(Gravity.CENTER);totals.add(total);//将totals数组中的所有值转换为Double并添加到arraylist demototalfor (int i = 0; i < totals.size(); i++) {最终字符串值 = totals.get(i);double total_ary = Double.parseDouble(value.replace(",","."));demototal.add(total_ary);}barCode.setText(itembarcode);itemDesc.setText(itemdesc);weightLine.setText(weight);rateAmount.setText(rate);制作金额.setText(制作)；netRate.setText(netrate);itemtotal.setText(total);String amount = ""+setArrayListElement(demototal);textViewSum.setText(amount);//设置总文本为amountnewRow.addView(barCode);newRow.addView(itemDesc);newRow.addView(weightLine);newRow.addView(rateAmount);newRow.addView(makingAmount);newRow.addView(netRate);newRow.addView(itemtotal);itemTable.addView(newRow);}//这里计算数量我们将setArrayListElement作为Double arraylist传递私人双 setArrayListElement(ArrayList inArray) {双倍量=0.0d；for (int i = 0; i < inArray.size(); i++) {数量 = 数量 + Double.valueOf((Double) inArray.get(i));}返还金额；}

<块引用>

这是 textwatcher 和计算 netrate 和 item total 的代码.

private void calculateAndShow(double wt, double rt, double mk) {String w = weightLine.getText().toString();wt = Double.parseDouble(w);双净率 = rt + mk;double Total = (NetRate/10) * wt;netRate.setText(NetRate + "");itemtotal.setText(Total + "");}私人 TextWatcher rateTextWatcher = new TextWatcher() {@覆盖public void beforeTextChanged(CharSequence s, int start, int count, int after) {}@覆盖public void onTextChanged(CharSequence s, int start, int before, int count) {}@覆盖公共无效 afterTextChanged(可编辑的){字符串率 = rateAmount.getText().toString();rt = Double.parseDouble(rate);计算并显示(wt，rt，mk)；费率.添加(费率)；}};私人 TextWatcher mkAmountTextWatcher = new TextWatcher() {@覆盖public void beforeTextChanged(CharSequence s, int start, int count, int after) {}@覆盖public void onTextChanged(CharSequence s, int start, int before, int count) {}@覆盖公共无效 afterTextChanged(可编辑的){String mkAmt = MakingAmount.getText().toString();mk = Double.parseDouble(mkAmt);计算并显示(wt，rt，mk)；mkCharges.add(mkAmt);}};

解决方案

你不能在你的值中使用 , 来解析成双精度

试试:

double total_ary = Double.parseDouble(value.replace(",","."));

I have a string arraylist with numbers like ["51,073","51,074","51,073"] now i want to convert this into a Double ArrayList and calculate the sum of the numbers in the array list.

Here is the code :

private ArrayList<String> totals = new ArrayList<>();
private ArrayList<Double> demototal = new ArrayList<>();
String total = itemData.getString(ParseBarcode.KEY_TOTAL);
totals.add(total);

/*converting all values from totals array to Double and add to arraylist demototal*/
for (int i = 0; i < totals.size(); i++) {
    final String value = totals.get(i);
    double total_ary = Double.parseDouble(value);
    demototal.add(total_ary);
}

String amount = ""+setArrayListElement(demototal);
        textViewSum.setText(amount);//set total text to amount


//calculate amount here we pass setArrayListElement as Double arraylist
private Double setArrayListElement(ArrayList inArray) {
    Double amount = 0.0d;
    for (int i = 0; i < inArray.size(); i++) {
       amount = amount + Double.valueOf((Double) inArray.get(i));
    }
    return amount;
}

This gives me java.lang.NumberFormatException: Invalid double: "51,073" exception.

For more clarity I am adding some more code.

 private void showItem(String json) {
    String itembarcode = "";
    String itemdesc = "";
    String weight = "";
    String rate = "";
    String making = "";
    String netrate = "";
    String total = "";


    try {
        JSONObject jsonObject = new JSONObject(json);
        JSONArray result = jsonObject.getJSONArray(ParseBarcode.JSON_ARRAY);
        JSONObject itemData = result.getJSONObject(0);
        itembarcode = itemData.getString(ParseBarcode.KEY_BARCODE);
        itemdesc = itemData.getString(ParseBarcode.KEY_DESC);
        weight = itemData.getString(ParseBarcode.KEY_WEIGHT);
        rate = itemData.getString(ParseBarcode.KEY_RATE);
        making = itemData.getString(ParseBarcode.KEY_MAKING);
        netrate = itemData.getString(ParseBarcode.KEY_NETRATE);
        total = itemData.getString(ParseBarcode.KEY_TOTAL);
    } catch (JSONException e) {
        e.printStackTrace();
    }


    //table started

    TableLayout.LayoutParams tableParams = new TableLayout.LayoutParams(TableLayout.LayoutParams.MATCH_PARENT, TableLayout.LayoutParams.WRAP_CONTENT);
    TableRow.LayoutParams rowParams = new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 1f);
    rowParams.setMargins(16, 0, 16, 0);

    TableLayout tableLayout = new TableLayout(AddInvEst.this);
    tableLayout.setLayoutParams(tableParams);

    TableRow newRow = new TableRow(AddInvEst.this);
    newRow.setLayoutParams(tableParams);

    barCode = new TextView(AddInvEst.this);
    barCode.setLayoutParams(rowParams);
    barCode.setGravity(Gravity.CENTER);

    itemDesc = new TextView(AddInvEst.this);
    itemDesc.setLayoutParams(rowParams);
    itemDesc.setGravity(Gravity.CENTER);

    weightLine = new TextView(AddInvEst.this);
    weightLine.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.75f));
    weightLine.setGravity(Gravity.CENTER);

    rateAmount = new EditText(AddInvEst.this);
    rateAmount.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));
    rateAmount.setGravity(Gravity.CENTER);
    rateAmount.addTextChangedListener(rateTextWatcher);

    makingAmount = new EditText(AddInvEst.this);
    makingAmount.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));
    makingAmount.setGravity(Gravity.CENTER);
    makingAmount.addTextChangedListener(mkAmountTextWatcher);

    netRate = new TextView(AddInvEst.this);
    netRate.setLayoutParams(new TableRow.LayoutParams(TableRow.LayoutParams.MATCH_PARENT, TableRow.LayoutParams.WRAP_CONTENT, 0.5f));
    netRate.setGravity(Gravity.CENTER);
    netrates.add(netrate);

    itemtotal = new TextView(AddInvEst.this);
    itemtotal.setLayoutParams(rowParams);
    itemtotal.setGravity(Gravity.CENTER);
    totals.add(total);

    //converting all values from totals array to Double and add to arraylist demototal
    for (int i = 0; i < totals.size(); i++) {
        final String value = totals.get(i);
        double total_ary = Double.parseDouble(value.replace(",","."));
        demototal.add(total_ary);

    }

    barCode.setText(itembarcode);
    itemDesc.setText(itemdesc);
    weightLine.setText(weight);
    rateAmount.setText(rate);
    makingAmount.setText(making);
    netRate.setText(netrate);
    itemtotal.setText(total);
    String amount = ""+setArrayListElement(demototal);
    textViewSum.setText(amount);//set total text to amount

    newRow.addView(barCode);
    newRow.addView(itemDesc);
    newRow.addView(weightLine);
    newRow.addView(rateAmount);
    newRow.addView(makingAmount);
    newRow.addView(netRate);
    newRow.addView(itemtotal);
    itemTable.addView(newRow);

}

//calculate amount here we pass setArrayListElement as Double arraylist
private Double setArrayListElement(ArrayList inArray) {
    Double amount = 0.0d;
    for (int i = 0; i < inArray.size(); i++) {
        amount = amount + Double.valueOf((Double) inArray.get(i));
    }
    return amount;

}

This is the code for textwatcher and calculating the netrate and item total.

private void calculateAndShow(double wt, double rt, double mk) {
    String w = weightLine.getText().toString();
    wt = Double.parseDouble(w);
    double NetRate = rt + mk;
    double Total = (NetRate / 10) * wt;

    netRate.setText(NetRate + "");
    itemtotal.setText(Total + "");
}

private TextWatcher rateTextWatcher = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {

    }

    @Override
    public void afterTextChanged(Editable s) {
        String rate = rateAmount.getText().toString();
        rt = Double.parseDouble(rate);
        calculateAndShow(wt, rt, mk);
        rates.add(rate);


    }
};

private TextWatcher mkAmountTextWatcher = new TextWatcher() {
    @Override
    public void beforeTextChanged(CharSequence s, int start, int count, int after) {

    }

    @Override
    public void onTextChanged(CharSequence s, int start, int before, int count) {

    }

    @Override
    public void afterTextChanged(Editable s) {
        String mkAmt = makingAmount.getText().toString();
        mk = Double.parseDouble(mkAmt);
        calculateAndShow(wt, rt, mk);
        mkCharges.add(mkAmt);

    }
};

解决方案

You cant use a , in your value to parse to a double

Try: 

double total_ary = Double.parseDouble(value.replace(",","."));

这篇关于将字符串数组列表存储到双数组列表中?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

查看全文
相关文章
Java开发最新文章
热门教程
热门工具
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆