Re: [Java] Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10 - ls Pls help me to solve

This is the line that's giving you trouble:
if (temperature[i][j] < temperature[i][j+1])

This works fine when i < 31 (always), j < 10 (always) and (j+1) < 10
(not always). When i and j are at the border condition, there is a problem:
if (temperature [31][9] < temperature [31][10])
Hence the ArrayOutOfBoundsException.

-Java Guy

Sri Rama Krishnamurthi wrote:
>
> Hi,
> I've started learning Java and creating small programs and compiling
> on my own using EditPlus Editor and Command Prompt.
> No doubt, my prorgram will tell you I'm a beginner.
>
> javac Temperature.java was successful.
>
> When I fire java Temperature I got the follwoing error.
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
> at Temperature.main(Temperature.java:44)
>
> I can see my "if clause" compares the values in the first row from the
> Print staements. After that it's throwing error. Somebody please help
> me to find out and fix this error.
>
> Thanks in advance
> Sri
>
> Program Starts
> class Temperature
> //To get the RowNum, ColumnNum of the highest and lowest teperature
> from the array temperature
> {
> public static void main(String[] args)
> {
> double temp;
> int maxDay = 0, maxCityCode = 0, minDay, minCityCode;
> double temperature [ ][ ] = {
> { 25.00, 24.50, 23.00, 23.50, 24.00, 24.50, 25.00, 25.50, 26.00, 26.50 },
> { 23.00, 24.00, 25.00, 26.00, 27.00, 28.00, 29.00, 30.00, 31.00, 32.00 },
> { 21.00, 23.00, 24.00, 23.50, 25.00, 25.00, 23.00, 26.00, 27.00, 30.00 },
> { 24.00, 23.67, 25.00, 24.33, 26.33, 26.33, 23.67, 27.67, 29.00, 33.00 },
> { 23.50, 23.92, 25.50, 24.33, 26.83, 26.58, 22.67, 27.92, 29.50, 34.75 },
> { 23.90, 24.17, 26.00, 24.33, 27.33, 26.83, 21.67, 28.17, 30.00, 36.50 },
> { 24.30, 24.42, 26.50, 24.33, 27.83, 27.08, 20.67, 28.42, 30.50, 38.25 },
> { 24.70, 24.67, 27.00, 24.33, 28.33, 27.33, 19.67, 28.67, 31.00, 40.00 },
> { 25.10, 24.92, 27.50, 24.33, 28.83, 27.58, 18.67, 28.92, 31.50, 41.75 },
> { 25.50, 25.17, 28.00, 24.33, 29.33, 27.83, 17.67, 29.17, 32.00, 43.50 },
> { 25.90, 25.42, 28.50, 24.33, 29.83, 28.08, 16.67, 29.42, 32.50, 45.25 },
> { 26.30, 25.67, 29.00, 24.33, 30.33, 28.33, 15.67, 29.67, 33.00, 47.00 },
> { 26.70, 25.92, 29.50, 24.33, 30.83, 28.58, 14.67, 29.92, 33.50, 48.75 },
> { 27.10, 26.17, 30.00, 24.33, 31.33, 28.83, 13.67, 30.17, 34.00, 50.50 },
> { 27.50, 26.42, 30.50, 24.33, 31.83, 29.08, 12.67, 30.42, 34.50, 52.25 },
> { 27.90, 26.67, 31.00, 100.00, 32.33, 29.33, 11.67, 30.67, 35.00, 54.00 },
> { 28.30, 26.92, 31.50, 24.33, 32.83, 29.58, 10.67, 30.92, 35.50, 55.75 },
> { 28.70, 27.17, 32.00, 24.33, 33.33, 29.83, 9.67, 31.17, 36.00, 57.50 },
> { 29.10, 27.42, 32.50, 24.33, 33.83, 30.08, 8.67, 31.42, 36.50, 59.25 },
> { 29.50, 27.67, 33.00, 24.33, 34.33, 30.33, 7.67, 31.67, 37.00, 61.00 },
> { 29.90, 27.92, 33.50, 24.33, 34.83, 30.58, 6.67, 31.92, 37.50, 62.75 },
> { 30.30, 28.17, 34.00, 24.33, 35.33, 30.83, 5.67, 32.17, 38.00, 64.50 },
> { 30.70, 28.42, 34.50, 24.33, 35.83, 31.08, 4.67, 32.42, 38.50, 66.25 },
> { 31.10, 28.67, 35.00, 24.33, 36.33, 31.33, 3.67, 32.67, 39.00, 68.00 },
> { 31.50, 28.92, 35.50, 24.33, 36.83, 31.58, 2.67, 32.92, 39.50, 69.75 },
> { 31.90, 29.17, 36.00, 24.33, 37.33, 31.83, 1.67, 33.17, 40.00, 71.50 },
> { 32.30, 29.42, 36.50, 24.33, 37.83, 32.08, 0.67, 33.42, 40.50, 73.25 },
> { 32.70, 29.67, 37.00, 24.33, 38.33, 32.33, -0.33, 33.67, 41.00, 75.00 },
> { 33.10, 29.92, 26.73, 24.33, 38.83, 32.58, -1.33, 33.92, 41.50, 76.75 },
> { 33.50, 30.17, 26.83, 24.33, 39.33, 32.83, -2.33, 34.17, 42.00, 78.50 },
> { 33.90, 30.42, 26.93, 24.33, 39.83, 33.08, -3.33, 34.42, 42.50, 80.25 }
> };
> for (int i=0; i<31; i++)
> {
> for (int j=0; j<10; j++)
> {
> System.out.println("temp =" + temperature[i][j] + " , " +
> temperature[i][j+1]);
> if (temperature[i][j] < temperature[i][j+1])
> {
> temp = temperature[i][j];
> temperature[i][j] = temperature[i][j+1];
> temperature[i][j+1] = temp;
> maxDay = i+1;
> maxCityCode = j+1;
> }
> else
> {
> minDay = 1;
> minCityCode = j+2;
> }
> System.out.println("Next Value");
> }
> }
> System.out.println("Maximum Temperature on Day" + maxDay);
> System.out.println("Maximum Temperature on City" + maxCityCode);
> }
> }
> Program Ends
>
> Output in command Prompt
> F:\UDX\Sample_Java_Programs>javac Temperature.java
>
> F:\UDX\Sample_Java_Programs>java Temperature
> temp =25.0 , 24.5
> Next Value
> temp =24.5 , 23.0
> Next Value
> temp =23.0 , 23.5
> Next Value
> temp =23.0 , 24.0
> Next Value
> temp =23.0 , 24.5
> Next Value
> temp =23.0 , 25.0
> Next Value
> temp =23.0 , 25.5
> Next Value
> temp =23.0 , 26.0
> Next Value
> temp =23.0 , 26.5
> Next Value
> Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
> at Temperature.main(Temperature.java:44)
>
> The INTERNET now has a personality. YOURS! See your Yahoo! Homepage.
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>
> [Non-text portions of this message have been removed]
>
>

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