Here’s one method, taking the user’s input one line at a time: import java.util.Scanner; class Matrix{ public static void main(String[] args){ char[][] matrix = new char[5][5]; Scanner in = new Scanner(System.in); System.out.println(“\nInput 5×5 char matrix one line at a time:\n”); for(int i = 0; i < matrix.length; i++){ String row = in.nextLine(); for(int j=0;j<matrix[i].length;j++){ matrix[i][j]=row.charAt(j); … Read more
create application class and write this code in application class public class MyApplictaion extends Application { private static MyApplication myApplication = null; public Map<String, String> fontDic; @Override public void onCreate() { super.onCreate(); fontDic = new HashMap<String, String>(); fontDic.put(“1”, “0x0627”); fontDic.put(“2”, “0x0628”); fontDic.put(“3”, “0x062A”); fontDic.put(“4”, “0x062B”); } public static MyApplication getInstance() { if (myApplication == null) … Read more
Well…no, there wouldn’t be, ServerSockets don’t have streamed input/output. A ServerSocket accepts connections, creating a Socket for each connection received (see accept), which is where the streams for that connection are. solved Where is the getInputStream() function in java 1.8?
If I don’t define dimensions, how do I ensure the whole background I’m painting is displayed? You could use a JLabel to display the ImageIcon. The size of the label will be the size of the image. You then set the layout manager of the label so you can add components to it. Edit: do … Read more
//Json object String json = ‘{“myid”:”123″,”post”:”harry”}’; JSONObject jobj = new JSONObject(json); String id = jobj.getString(“myid”); //Json Array String json = ‘[{“myid”:”123″,”post”:”harry”},{“myid”:”456″:”ramon”}]’; JSONArray jarr = new JSONArray(json); JSONObject jobj = jarr.getJSONObject(0); String id = jobj.getString(“myid”); You will have to wrap it in a try catch to make sure to catch exceptions like json strings that cant … Read more
So, blah defines an instance field called label but does not initialise it public abstract class Blah { protected JLabel label; } BlahChildOne initialises the label from Blah public class BlahChildOne extends Blah { public BlahChildOne() { label = new JLabel(); } } BlahChildTwo does not initialises the label from Blah, so it is still … Read more
please find below working code import java.util.regex.Matcher; import java.util.regex.Pattern; public class Main { public static void main(String[] args) { String line = “This cat MAN-1243-23445 placed OK? This cat MAN-1243-23445 placed OK? This cat MAN-1243-23445 placed OK? This cat MAN-1243-23445 placed OK?This cat MAN-1243-23445 placed OK? This cat MAN-1243-23445 placed OK?”; String pattern = “(MAN-\\d{4}-\\d{5})”; … Read more
Try this: public static void main(String[] args) { for(int i=0;i<5;i++) { for(int j=0;j<5-i;j++) { System.out.print(” “); } for(int k=0;k<=i;k++) { System.out.print(“* “); } System.out.println(); } } Output: * * * * * * * * * * * * * * * Just for your knowledge System.out.println will print on a new line where System.out.print … Read more
In your example, All MyThread instances created with id of 1 will synchronize on the MyThread class object. This means that no two MyThread instances can be “in” the first synchonized block at the same time. All MyThread instances created with id of 2 will synchronize on this. Now this is the thread object itself1. … Read more
Try if (kindOfEmployee == 2) { System.out.println(“Overtime Rate:”); overtimeRate = input.nextInt(); System.out.println(“Overtime Hours:”); overtimeHours = input.nextInt(); overtimePay = overtimeRate*overtimeHours; } 0 solved employee’s job to calculate salary using java
Find the intersection Find the union Subtract the intersection from the union Code: public static void main(String[] args) { Set<Integer> set1 = new HashSet<Integer>(Arrays.asList(1, 2, 3, 4, 5)); Set<Integer> set2 = new HashSet<Integer>(Arrays.asList(1, 3, 6, 7)); Set<Integer> intersection = new HashSet<Integer>(set1); intersection.retainAll(set2); // set1 is now the union of set1 and set2 set1.addAll(set2); // set1 … Read more
You will probably want some thing like the Calendar for the time addition. Example: Calendar future = Calendar.getInstance(); future.add(Calendar.HOUR_OF_DAY, enteredHour); future.add(Calendar.MINUTE, enteredMinute); future.add(Calendar.SECOND, enteredSecond); //And so on… //Now the calendar instance ‘future’ holds the current time plus the added values. As for entering the time, one possibility is to enter it as a text, and … Read more
The idea is to make your black and white fields dependent of both of your for-loop counters. for(int i =0; i < n; i++) { for(int j = 0; j < n; j++) { if( (i+j) % 2 == 0){ System.out.print(“*”); } else { System.out.print(” “); } } System.out.println(“”); } or switch the ” ” … Read more
peek is just a way to peek inside the stream, it doesn’t change it but the function in peek will receive all the elements that are in the stream. forEach is an terminal operation that will consume all the data in the stream and return void. The result of the above code will be each … Read more
When it’s only a small file you could solve it like this read all lines into a list implement your own Comparator sort the list using your own comparator The example is only a PoC. Anything not necessary to show the principle has been omitted. import java.io.IOException; import java.nio.charset.Charset; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; … Read more