java

[Solved] Iteration In Arraylist in Java

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[ad_1] Use a hashMap and check if this key already exists then update the double value by adding existing double value then put in the map. public static void main(String[] args) { List<MyObject> list = new ArrayList<MyObject>(); list.add(new MyObject(“a”,”b”,”c”,new BigDecimal(10.23))); list.add(new MyObject(“a”,”b”,”e”,new BigDecimal(10.23))); list.add(new MyObject(“a”,”b”,”c”,new BigDecimal(10.23))); list.add(new MyObject(“a”,”b”,”d”,new BigDecimal(10.23))); Map<MyObject,MyObject> map = new HashMap<MyObject,MyObject>(){ @Override … Read more

[Solved] Depth of BSTree node ( java ) [closed]

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[ad_1] Psuedocode: Function Depth If the right child isn’t null, set left_depth to Depth(left_child), else set left_depth to 0. If the left child isn’t null,set right_depth to Depth(right_child), else set right_depth to 0. return maximum(left_depth, right_depth) + 1; See this posted code. 0 [ad_2] solved Depth of BSTree node ( java ) [closed]

[Solved] Remove error of my code Please [closed]

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[ad_1] tvTemp8 = (ImageView) convertView.findViewById(R.id.dpimageurl); convertView is not needed. And if you want to search in view hierarchy of current activity, convertView is not initialised. Inside onCreate(), convertView=this; or convertView=PlantDetails.this;. 3 [ad_2] solved Remove error of my code Please [closed]

[Solved] Bugfixes between Java Version Update [closed]

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[ad_1] Search for Java changelog in your favorite search engine. Click on the link to http://www.oracle.com/technetwork/java/javase/releasenotes-136954.html Click on Changes in 1.6.0_30 to find out what was changed in 1.6.0_30 Repeat for every version you are interested in. 4 [ad_2] solved Bugfixes between Java Version Update [closed]

[Solved] Make 2 arrays from one array [closed]

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[ad_1] You can try something like this: int[] arr= {-1, -2, 0, 1, 2}; int p=0; int n=0; for(int i=0; i<arr.length-1; ++i) { if(arr[i]>=0) { p=p+1; } else { n=n+1; } } int[] posarr=new int[p]; int[] negarr=new int[n]; p=0; n=0; for(int i=0; i<arr.length-1; ++i) { if(arr[i]>=0) { posarr[p]=arr[i]; p=p+1; } else { negarr[n]=arr[i]; n=n+1; } … Read more

[Solved] “java.lang.NoClassDefFoundError: javax/mail/MessagingException” (Using spigot / Bukkit) (Eclipse) [closed]

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[ad_1] 1) Have you used following 2 jars ? mail.jar activation.jar 2) Try switching to latest jars if issue still persist. 3) Make sure jar are available in class-path and there are no version conflicts. 4) Try upgrading you java version to 1.6+ if using lower versions. 5) Add the jars to your WEB-INF/lib folder … Read more

[Solved] Why does following Java program does not give error?

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[ad_1] The if and the else both have different scopes. Variables declared in the if can be used only in the if and any of its children Similarly, variables declared in the else can be used only in the else and any of its children Read more about variable scope for more information. [ad_2] solved … Read more

[Solved] “unreported exception IOException; must be caught or declared to be thrown”. Have a look on the coding [duplicate]

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[ad_1] You need to handle the exception for Runtime.getRuntime().exec(“calc”);. Try this: else if(e.getActionCommand().equals(“Window Calculator”)){ try { Runtime.getRuntime().exec(“calc”); } catch(IOException ioe) { ioe.printStackTrace(); } } From OP comments: If i catch the exception,how will it help..the code that i want to use will not be executed by this This will not help you to run your … Read more

[Solved] Passing Boolean to method that expects boolean [closed]

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[ad_1] Unboxing When you call a method that wants a boolean but give it a Boolean, Java has to unbox the value. This happens automatically and implicitly. Therefore, during compilation, Java replaces your call foo(value); by foo(value.booleanValue()); This process is explained in detail in JLS, chapter 5.1.8. Unboxing Conversion: At run time, unboxing conversion proceeds … Read more