Create a byte[] with the rgb values for each pixel of the image you want. The byte[] length will be width * height * 3 (3 values for each pixel). Look at this for an example of how create a BufferedImage from the byte[]. Another alternative is to create a BufferedImage and set the rgb … Read more
First of all your question isn’t much describe your requirement and what have you tried so far. But assuming your question you can try as follows. you can create a Map<Key,Value> Integer value as a Key and Integer List<Integer> as Value Map<Integer,List<Integer>> map=new HashMap<>(); List<Integer> list=new ArrayList<>(); list.add(1); list.add(2); map.put(1,list);// key is 1, values 1 … Read more
I am not going to help you with the complete solution as it seems to be your homework 😉 You should get compilation error on lines System.out.println(CalculateBill1()); System.out.println(CalculateBill2()); System.out.println(CalculateBill3()); because there is no method with definition as void parameter. you need to pass appropriate parameters to call these methods. For example to call method “CalculateBill1 … Read more
Ok, I think you must do that. The right thing in LWUIT is using Dialog. Create a Dialog using new. i.e. Dialog d = new Dialog() The next step is filling the title and body with Dialog.setTitle(String text) or putting something inside the Dialog‘s layout. When your Dialog is ready to be shown, you must … Read more
you can use this method public int countMonday(int year, int month) { Calendar calendar = Calendar.getInstance(); // Note that month is 0-based in calendar, bizarrely. calendar.set(year, month – 1, 1); int daysInMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); int count = 0; for (int day = 1; day <= daysInMonth; day++) { calendar.set(year, month – 1, day); int dayOfWeek … Read more
Answer explained in comments import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Arrays; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Set; import org.apache.commons.io.FileUtils; public class Practice { public static void main (String[] args) { // ArrayList<String> array = new ArrayList<String>(); // ArrayList<String> dup = new ArrayList<String>(); File file = new File (“christmas_carol.txt”); try { … Read more
Boann’s answer is correct. public static void main(String[] args){ int[] array = {5, 4, 3, 2, 1}; System.out.print(“results: “); for (int i = 0; i < array.length; i++){ array[i] = factorial(array[i]); System.out.print(array[i]); } 2 solved Replacing old values with new values in old array [closed]
The object that you’re extending,Event, does not have a constructor that takes no arguments. So you need to call super and specify arguments like you do in your other constructor. solved Implicit super constructor Event() is undefined [duplicate]
I often have problems with the R file as well. Here are some things you can try: Delete R.java and see if it regenerates (make sure Auto build is turn on) Turn off auto build and manually compile the project Go to your hidden .android folder and delete debug_keystore, then restart Eclipse and rebuild. May … Read more
Problem resolved! I had problems with encoding of input file. And i had to add fileWriter.flush(); fileWriter.close(); solved java Scanner.hasNext always false
Since you just want to refresh the current page,ajax is a better choice for you. For you current design,both forward and redirect are okay,but something need to pay attention: if you use redirect,you can set parameters via the url after forward or redirect,you need to query the exits comments,which means that you had can either … Read more
[…] matches any character defined in the character class, so [X{9,11}\\*{2,3}] actually means, a single character which is: X, or open brace, or 9, or comma, or 1, or 1 (yes you have it duplicated), or backslash, or asterisk…. So as your string have more than character in your string to-be-matched, such pattern will not … Read more
Code to change the textview‘s text through java code should contain at least one TextView object to start with. I can not see that in your code. But I am writing below a sample code for that. setContentView(R.layout.activity_main); TextView txtView = (TextView) findViewById(R.id.txtview); txtView.setText(“This is changed text”); Your activity_main.xml should contain TextView defined with id … Read more
You cannot use class as a variable name because it has a specific meaning in Java. Choose a different variable name for your string. solved How do I declare a private String without an error? [closed]
Depends on what you really want to do, for example if you only want to get the value of a given key, given that key and value are separated by colon and key/value are separated by comma, you can just split in this way string first by comma and then by colon : String[] couple … Read more