I’m not sure I do understand exactly what you want, but it is improbable that you will get it using a sungle thread and an endless empty loop. First, that program will use at most one system thread, and therfore, a single CPU core. Second, the hotspot compiler is likely to optimize away your empty … Read more
Using an array, boolean bs = new boolean[10]; lightUp(bs, 6); // only bs[6] will be true after this lightUp(bs, 0); // only bs[0] will be true after this With the lightUp function defined as: /** * modifies the passed-in array to make sure only * the selected index is set to true */ void lightUp(boolean[] … Read more
Try something like: System.out.println(“Kilograms Grams”); for (int i =1; i<=25;i++) { System.out.println(i + ” ” + i*1000); } solved Conversion from kilograms to grams – JAVA [closed]
This should work: public static void main(String[] args) { String[] input = {“1/ce/a6/5a/1cea65ab9260df8d55fb29ce0df570d3.jpg ::: 2021-09-17T17:07:52Z”, “1/ce/a6/5a/1cea65ab9260df8d55fb29ce0df570d4.jpg ::: 2021-09-17T17:07:52Z”, “1/ce/a6/5a/1cea65ab9260df8d55fb29ce0df570d3.jpg ::: 2021-09-17T17:07:00Z”}; HashMap<String, String> outMap = new HashMap<>(); List<String> keys = new LinkedList<>(); for(String line:input) { String key = line.substring(0, line.indexOf(“:::”)); String oldVal = outMap.putIfAbsent(key, line); if(oldVal==null) { keys.add(key); } } List<String> collect = keys.stream().map(key -> … Read more
How to write a code that draws a certain object, in this case a rectangle, where the coordinates are specified with mouse clicks? solved How to write a code that draws a certain object, in this case a rectangle, where the coordinates are specified with mouse clicks?
What about this, you iterate over the array and check that the square of the square root is the same as the original number. If so, you add it to a list that you convert to an array once you are done. int[] numbers = new int[] { 1,2,3,4,5,6,7,8,9,10 }; List<Integer> resultList = new ArrayList<>(); … Read more
A file on your machine is associated with a File object in Java. This allows the “stream of bytes” to have behaviors (methods) that can be useful for developers. If I had just a stream of bytes, I can do little more than read the stream and do something with the data of the file. … Read more
You will need to access your favorite exchange url using HttpURLConnection, then get the html contents, parse it , and get the bit-coin exchange rate. check this example, then you can look up the value inside contents variable based on the business logic, : package com.jalalkiswani.stackoverflow.answers; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import … Read more
You can print the entire contents of args like so: System.out.println(Arrays.toString(args)); 6 solved String args display
void reverseLevelOrder(struct node* root) { int h = height(root); int i; for (i=h; i>=1; i–) //THE ONLY LINE DIFFERENT FROM NORMAL LEVEL ORDER printGivenLevel(root, i); } /* Print nodes at a given level */ void printGivenLevel(struct node* root, int level) { if (root == NULL) return; if (level == 1) printf(“%d “, root->data); else if … Read more
This expression (GUInumber1 >= 0 || <= 0) is not correct. You will need something on both sides of the <= operator. solved Strings in ternary operators interacting with numbers [closed]
All packages until jdk.* are private to the JVM and shouldn’t be accessed directly. You can enable the compiler and JVM to let you use them, but you should explore all other possible options first. 2 solved err is prompting while compiling class which imports dk.nashorn.internal.objects.annotations in java 11
The bit you seem to be missing is that when the user enters for example “Monday”, you need to convert this string into something that Java can understand as a day of week. This is done through parsing. Fortunately using java.time, the modern Java date and time API, it is not so hard (when you … Read more
The specification of the Java language does not specify how long time certain statements will take to execute, so there is no answer to your question. A smart enough compiler is free to compile both statements to a no-op and still be compliant. In fact, the JIT will most likely do so in both of … Read more
The (int) actually goes with the next portion of code: it casts the result of ((Math.random () * (3))) to an integer. (This will simply drop the decimal portion; it will not round). Math.random() returns a number that is greater than or equal to 0.0 and less than 1.0. ((Math.random () * (3))) simply returns … Read more