CODEWITHSUNDEEP
androidcasting
Viddyut Khanvilkar
Viddyut Khanvilkar

Reputation: 295

Throws exception while Type casting from String to Int.

I have no idea what is going wrong here. Code Snippet

       b1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            try {
                String s1=SpinnerObj.getSelectedItem().toString();
                String n1=s1.substring(s1.indexOf("Rs")+2,s1.length()-1);
                int ns1=Integer.parseInt(String.valueOf(n1));//Couldnt cast and throws Exception
                Toast.makeText(getBaseContext(),""+ns1,Toast.LENGTH_LONG).show();
                Intent i = new Intent(getBaseContext(),OrderPlaced.class);
                startActivity(i);
            }
                catch (NumberFormatException nfe) {
                Toast.makeText(getBaseContext(), "gg", Toast.LENGTH_LONG).show();
            }
        }});

here i m trying to Type cast the String getting from Spinner to integer for computaions.

Upvotes: 1

Views: 690

Answers (3)

杜咸鱼
杜咸鱼

Reputation: 19

maybe the string has a space. you should use n1.trim()

Upvotes: -1

Iulian Popescu
Iulian Popescu

Reputation: 2643

Based on the string you gave in comments: Havells fan(Rs 900) you include a whitespace in your string while computing the starting index for the number because s1.indexOf("Rs")+2(this computation will give 14) will point to the whitespace (index 14), not to 9(index 15). For a proposed a solution, you can use any of the existing answers either trimming the string (n1.trim()) or counting the space char when you compute the starting index(s1.indexOf("Rs")+3).

Upvotes: 0

Omkar
Omkar

Reputation: 3100

IMO you are taking incorrect first index of substring try below code

  String test = "Havells fan(Rs 900)";
        String n1=test.substring(test.indexOf("Rs")+3,test.length()-1);\\ use +3 instead of +2
        int ns1 = Integer.parseInt(String.valueOf(n1));
        Toast.makeText(getBaseContext(),""+ns1,Toast.LENGTH_LONG).show();

Upvotes: 3

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