Getting array index out of bounds when splitting a string in android

Question

I am working on android. I have a string like below.

I am splitting the above string with "@" using String[] str1 = str.split("[@]"); so that the final results are

str1[0] = test1|test2|test3

str1[1] = test4|test5|test6|test7

...

The code snippet I used

 for (int x = 1; x < str1.length; x++) { String[] st1 = str1 [x].trim().split("\\|"); System.out.println("first" + st1[0].trim()); System.out.println("second" + st1[1].trim()); System.out.println("third" + st1[2].trim()); System.out.println("fourth" + st1[3].trim()); List1.add(st1[0].trim()); List2.add(st1[1].trim()); List3.add(st1[2].trim()); List4.add(st1[3].trim()); }

In the above for loop, when the loop starts from x=2 it is working fine. But if I give x=1 then it is throwing array index out of bounds exception at "System.out.println("fourth" + st1[3].trim());". Is because str1[0] consists of only 3 items whereas the remaining consists of 4 items. So now I am unable to get the fourth value after splitting with "|". Please tell me how to get the fourth value. Thanks in advance.

Hunain · Accepted Answer · 2013-08-12 05:25:10Z

ArrayIndexOutOFBound is coming because you are accessing the forth value you can get by following two ways,

String[] str1 = str.split("@"); for (int x = 1; x < str1.length; x++) { String[] st1 = str1[x].trim().split("\\|"); for (int j = 0; j < st1.length; j++) { System.out.println(st1[j]); } }

or

String[] str1 = str.split("@"); for (int x = 1; x < str1.length; x++) { String[] st1 = str1[x].trim().split("\\|"); /*for (int j = 0; j < st1.length; j++) { System.out.println(st1[j]); }*/ if(st1.length> 0 ) System.out.println("first" + st1[0].trim()); if(st1.length> 1 ) System.out.println("second" + st1[1].trim()); if(st1.length> 2 ) System.out.println("third" + st1[2].trim()); if(st1.length> 3 ) System.out.println("fourth" + st1[3].trim()); }

Umer Farooq · Accepted Answer · 2013-08-12 05:22:45Z

You have @ in your string I don't see [@] any where, so why are you splitting the string with this token.

Change

String[] str1 = str.split("[@]")

to

String[] str1 = str.split("@")

For solving indexOutOfBounds:

for (int x = 1; x < str1.length; x++) { String[] st1 = str1 [x].trim().split("\\|"); for (int j = 0; j < st1.length; j++) { System.out.println( j "= " + st1[j].trim()); } }

Gunaseelan · Accepted Answer · 2013-08-12 05:32:42Z

String str = "@test1|test2|test3@test4|test5|test6|test7@test8|test9|test10|test11@test12|test13|test14|test15@"; String[] str1 = str.split("[@]"); for (int x = 0; x < str1.length; x++) { String[] str2 = str1[x].trim().split("\\|"); for (int y = 0; y < str2.length; y++) { System.out.println(str2[y].trim()); } }

Output:

test1 test2 test3 test4 test5 test6 test7 test8 test9 test10 test11 test12 test13 test14 test15

Hope this will help you.

Bhoomika Brahmbhatt · Accepted Answer · 2013-08-12 05:57:06Z

for (int x = 1; x < str1.length; x++) { String[] st1 = str1 [x].trim().split("\\|"); System.out.println("first" + st1[0].trim()); System.out.println("second" + st1[1].trim()); System.out.println("third" + st1[2].trim()); System.out.println("fourth" + st1[3].trim()); }

Change to:

for (int x = 0; x < str1.length; x++) { String[] st1 = str1 [x].trim().split("\\|"); for (int y = 0; y < st1.length; y++) { System.out.println("value at "+String.ValueOf(y)+": " + st1[y].trim()); } }

Hi it is working fine..thank you..but when i am adding individual values to arraylist it is showing array index out of bounds at line "List4.add(st1[3].trim());". How can I add the 4th value?
can you show me your code that in which arraylist you geting exception

P. Hoang · Accepted Answer · 2013-08-12 18:18:50Z

You have IndexOutOfBoundException because the first substring (str1[0]) only has 3 items and you tried to access the 4th item. This code snippet should work.

String[] str1 = str.split( "[@]" ); List<String> list = new ArrayList<String>(); for ( int x = 1; x < str1.length; x++ ) { String[] st1 = str1[ x ].trim().split( "\\|" ); for ( int index = 0; index < st1.length; index++ ) { String value = st1[ index ].trim(); System.out.println( "value in index " + index + "=" + value ); list.add( value ); } }

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