I’m not sure that I really understand your description of what you are doing, but this stands out: this.containers.put(this.currentHashMapKey, tempHashMap); // … tempHashMap.clear(); When you call clear(), you remove all entries from tempHashMap. Since this is the map object that you added as a value in the containers map, you are clearing it there as … Read more
Assuming you’re talking about java.util.Scanner, the default delimiter is whitespace. Therefore, if you enter “14 45 20 16” on the command line and then pressed the enter key, the nextInt or next call on the scanner instance would return 14. If you then call nextInt on scanner again, you get no prompting; that would immediately … Read more
you are not sending RequestParam value, you need to mark it required=false so your method will public String greeting(@RequestParam(value = “name”, required=false, defaultValue = “World”) String name){ solved Why Spring documentation is not perfect [closed]
The drawImage() methods returns a boolean. Many people don’t realize this, since the return value of drawImage() is often ignored. However, that boolean tells you whether or not the image was drawn successfully. If it was, drawImage() returns true. Otherwise drawImage() returns false. 3 solved understanding syntax of boolean Graphics.drawImage()
Let’s have a look at this line: int a = Math.round((float)(360/size)); And assume that size==361. Since size is an int we have an integer-division and 360/size equals 0. Then you cast it to a float resulting in 0.0f, round it (givin 0.0f) and assign it to an int that’s also 0 as a result. What … Read more
Static methods are those methods can be called without creating its object. It can be invoked using its class name. Eg. Math.sqrt(25); Where Math is the class name, not an object and static methods can access only static properties of the class. solved what is static method why use this in Display class in java … Read more
Because temp is integer type, while c[0] is Customer type 21 solved can we assign object array index value to any integer type variable in java? [closed]
You can solve issue of greyed out Map box in popup with just change of popup’s theme style. with just change style of dialog. Like – dialog = new Dialog(HomeScreen.this, android.R.style.Theme_Black_NoTitleBar_Fullscreen); 1 solved Mapbox Greyed out on dialog/Popup [closed]
You are using the wrong class see class ProgramSix vs Program6 program6 = new Program6(); 12 solved Java reading data from a .txt file and outputting it to an output.txt file [closed]
Do you mean by this: String newStr = str.replaceAll(“\\[.*?\\] ?”, “”); 1 solved Search for a string and assign the ones it is not in the braced brace to a new string
In java, you can do this by using Reflection: Reflection is commonly used by programs which require the ability to examine or modify the runtime behavior of applications running in the Java virtual machine. For example: try { addObject(c.newInstance(),x,y); } catch (InstantiationException | IllegalAccessException e) { e.printStackTrace(); } For more about reflection, you can read … Read more
Are you sure that you are checking power of 2? Rather, being checked divisible with 2. If you are serious, use the piece of cake snippet return n > 0 && ((n & -n) == n); The second way, private static boolean powerOf2(int num) { if(num <= 0){ return false; } while(num > 1) { … Read more
The short answer is arrays have a set size you define where as an arraylist has infinite size. You’ll learn a lot about them from the api https://docs.oracle.com/javase/7/docs/api/java/lang/reflect/Array.html https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html solved Difference between ArrayList and Array of object [duplicate]
try the following Adapter…… public class MyAdapter extends BaseAdapter { Context con; ArrayList<your type> mlist; RoomModel sched; public MyAdapter(Context con,ArrayList<your type> mlist ) { this.con=con; this.mlist=mlist; } @Override public int getCount() { // TODO Auto-generated method stub return mlist.length; } @Override public Object getItem(int position) { // TODO Auto-generated method stub return mlist[position]; } @Override … Read more
Use the following regex str= str.replaceAll(“\((.+)\)”, “”); 2 solved Java regular expression : how to get rid of text inside ()? [duplicate]