CODEWITHSUNDEEP
javaandroid
Ammar
Ammar

Reputation: 1233

How to convert HEX into two digits format?

I want to convert a decimal number into HEX. For example 14 into E but then I want to convert E into two digits format like 0E. This is my code but its given me an error. 

int lightOnHours = 14;
Log.d("Two Digits", String.format("%02s",Integer.toHexString(lightOnHours));

Error Message

07-11 16:57:32.422: E/AndroidRuntime(12832): java.util.FormatFlagsConversionMismatchException: %s does not support '0'
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.util.Formatter$FormatToken.checkFlags(Formatter.java:1359)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.util.Formatter.transform(Formatter.java:1440)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.util.Formatter.doFormat(Formatter.java:1079)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.util.Formatter.format(Formatter.java:1040)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.util.Formatter.format(Formatter.java:1009)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.lang.String.format(String.java:1998)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.lang.String.format(String.java:1972)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at com.test.digits.TestFragment2$5.onClick(TestFragment2.java:158)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at android.view.View.performClick(View.java:3627)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at android.view.View$PerformClick.run(View.java:14329)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at android.os.Handler.handleCallback(Handler.java:605)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at android.os.Handler.dispatchMessage(Handler.java:92)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at android.os.Looper.loop(Looper.java:137)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at android.app.ActivityThread.main(ActivityThread.java:4511)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.lang.reflect.Method.invokeNative(Native Method)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at java.lang.reflect.Method.invoke(Method.java:511)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:976)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:743)
07-11 16:57:32.422: E/AndroidRuntime(12832):    at dalvik.system.NativeStart.main(Native Method)

Thanks!

Upvotes: 1

Views: 1092

Answers (4)

Rakesh KR
Rakesh KR

Reputation: 6527

Try,

int lightOnHours = 14;
System.out.println(
        Integer.toHexString(lightOnHours).length()==1
        ?"0"+Integer.toHexString(lightOnHours)
        :Integer.toHexString(lightOnHours)
);

Upvotes: 0

David Conrad
David Conrad

Reputation: 16379

Instead of using the s format specifier for String.format, you can use the x specifier which formats an integer as hexadecimal:

String.format("%02x", lightOnHours)

Or X if you prefer uppercase hexadecimal:

String.format("%02X", lightOnHours)

Upvotes: 6

Henry
Henry

Reputation: 43758

You can use

String.format("%02X", lightOnHours)

Upvotes: 6

CodeWarrior
CodeWarrior

Reputation: 5176

Use String.format("%02X", lightOnHours)

Upvotes: 3

Related Questions