Converting double to string

Question

I am not sure it is me or what but I am having a problem converting a double to string   here is my code   double total   44  String total2   Double toString total     Am i doing something wrong or am i missing a step here   I get error NumberFormatException when trying to convert this   totalCost setOnTouchListener new OnTouchListener       public boolean onTouch View v  MotionEvent event        try         double priceG   Double parseDouble priceGal getText   toString           double valG   Double parseDouble volGal toString           double total   priceG   valG        String tot   new Double total  toString          totalCost setText tot         catch Exception e          Log e  text   e toString                return false                     I am trying to do this in an onTouchListener  Ill post more code  basically when the user touches the edittext box i want the information to calculate a fill the edittext box

User · Answer

double priceG   Double parseDouble priceGal getText   toString     double valG   Double parseDouble volGal toString       One of those is throwing the exception  You need to add some logging printing to see what s in volGal and priceGal - it s not what you think

User · Answer

double total   44  String total2  new Double total  toString      this code works

User · Answer

double toString   should work  Not the variable type Double  but the variable itself double

User · Answer

Kotlin You can use  toString directly on any data type in kotlin  like val d   Double   100 00 val string   String   d toString

User · Answer

There are three ways to convert double to String    Double toString d  String valueOf d     d  public class DoubleToString    public static void main String   args        double d   122      System out println Double toString d        System out println String valueOf d        System out println    d            String to double   Double parseDouble str

User · Answer

How about when you do the   totalCost setText tot     You just do   totalCost setText       total      Where the       lt  variable   will convert it to string automaticly

User · Answer

Just use the following   doublevalue        This will work for any data type   Example   Double dd 10 09  String ss dd

User · Answer

double priceG   Double parseDouble priceGal getText   toString      double valG   Double parseDouble volGal toString      double priceG   Double parseDouble priceGal getText   toString      double valG   Double parseDouble volGal toString      double priceG   Double parseDouble priceGal getText   toString      double valG   Double parseDouble volGal toString       it works  got to be repetitive

User · Answer

Use StringBuilder class  like so   StringBuilder meme   new StringBuilder           Convert and append your double variable meme append String valueOf doubleVariable        Convert string builder to string jTextField9 setText meme toString       You will get you desired output

User · Answer

Complete Info You can use String valueOf   for float  double  int  boolean etc  double d   0  float f   0  int i   0  short i1   0  char c   0  boolean bool   false  char   chars       Object obj   new Object      String valueOf d   String valueOf i   String valueOf i1   String valueOf f   String valueOf c   String valueOf chars   String valueOf bool   String valueOf obj

User · Answer

Using Double toString    if the number is too small or too large  you will get a scientific notation like this  3 4875546345347673E-6  There are several ways to have more control of output string format    double num   0 000074635638     use Double toString   System out println Double toString num       result  7 4635638E-5     use String format System out println String format    f   num       result  0 000075 System out println String format     9f   num       result  0 000074636     use DecimalFormat DecimalFormat decimalFormat   new DecimalFormat      0 000000    String numberAsString   decimalFormat format num   System out println numberAsString      result  0 000075   Use String format   will be the best convenient way

User · Answer

This code compiles and works for me   It converts a double to a string using the calls you tried   public class TestDouble        public static void main String   args            double total   44          String total2   Double toString total            System out println  Double is     total2             I am puzzled by your seeing the NumberFormatException  Look at the stack trace  I m guessing you have other code that you are not showing in your example that is causing that exception to be thrown

User · Answer

double total   44  String total2   String valueOf total     This will convert double to String

User · Answer

The exception probably comes from the parseDouble   calls  Check that the values given to that function really reflect a double

[java] Converting double to string

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