CODEWITHSUNDEEP
java
Robert Verkerk
Robert Verkerk

Reputation: 714

convert string array to int

I am trying to convert a array with text and numbers to an int.

the array separated:

What I want is that the [1] ends up being a int.

I tried:

int logSetting = Integer.parseInt(String.valueOf(separated));

and

int logSetting = Integer.parseInt(String.valueOf(separated[1]));

Both made the app crash

09-16 09:57:30.865: E/AndroidRuntime(27938): FATAL EXCEPTION: main

09-16 09:57:30.865: E/AndroidRuntime(27938): Process: my.project, PID: 27938
09-16 09:57:30.865: E/AndroidRuntime(27938): java.lang.NumberFormatException: Invalid int:

"[Ljava.lang.String;@42b273f0"

09-16 09:57:30.865: E/AndroidRuntime(27938):  at java.lang.Integer.invalidInt(Integer.java:137)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at java.lang.Integer.parse(Integer.java:374)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at java.lang.Integer.parseInt(Integer.java:365)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at java.lang.Integer.parseInt(Integer.java:331)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at my.project.MainActivity.fileReader(MainActivity.java:928)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at my.project.MainActivity.logCat(MainActivity.java:944)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at my.project.MainActivity$1.run(MainActivity.java:854)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at android.os.Handler.handleCallback(Handler.java:733)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at android.os.Handler.dispatchMessage(Handler.java:95)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at android.os.Looper.loop(Looper.java:157)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at android.app.ActivityThread.main(ActivityThread.java:5356)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at java.lang.reflect.Method.invokeNative(Native Method)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at java.lang.reflect.Method.invoke(Method.java:515)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)

09-16 09:57:30.865: E/AndroidRuntime(27938):  at dalvik.system.NativeStart.main(Native Method)

Upvotes: 1

Views: 141

Answers (3)

Kick Buttowski
Kick Buttowski

Reputation: 6739

Based on your exception which is NumberFormatException, when you try to convert a String to a numeric value, like an int, float, double, long, etc which does not have right format

For example:

public class ConvertStringToNumber
{

  public static void main(String[] args)
  {
    try
    {
      String s = "FOOBAR";
      int i = Integer.parseInt(s); <--this line of code will never be reached
      System.out.println("int value = " + i);
    }
    catch (NumberFormatException nfe)
    {
      nfe.printStackTrace();
    }
  }
  1. Source for the Code
  2. Read more and Another Source

Upvotes: 0

Le Ish Man
Le Ish Man

Reputation: 461

You're almost there, int logSetting = Integer.parseInt(String.valueOf(separated[1])); should just be int logSetting = Integer.parseInt(separated[1]);. If this doesn't work its probably something else crashing your code. What error do you get?

Upvotes: 1

Ruchira Gayan Ranaweera
Ruchira Gayan Ranaweera

Reputation: 35587

You can do something like this

String[] separated=new String[]{"some text ","1","some more text"};
int logSetting = 0;
  for(String i:separated){
     try {
        logSetting = Integer.parseInt(i);
      }catch (NumberFormatException e){
        System.out.println("NumberFormatException \""+i+"\" is not a number");
      }
     }
  System.out.println(logSetting);

Out put:

 NumberFormatException "some text " is not a number
 NumberFormatException "some more text" is not a number
 1

Upvotes: 4

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