In fact, I'm not yet past that "Hello World" program.I'm following the steps in "Head First: Java" book, and reached that point where one is ready to write his/her 1st Java code. Here's mine:
public class MyFirstApp
{
public static void main (String[] args)
{
System.out.println("I Rule!");
System.out.println("The World!");
}
}
As simple as it should be, and compiles fine producing the correspondent class. But it doesn't run, however, and spits the following execution-time errors:
Exception in thread "main" java.lang.UnsupportedClassVersionError: MyFirstApp : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:643)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:277)
So I am finishing up a GUI that randomly rolls a dice and shows you the dice face from a file that I have on my computer. It compiles fine, but when I open the GUI and press the button "Roll" it gives me errors and does not display the images.
So I'm learning java having been using c#. I based this code off an example from class. It compiles fine with no errors, but I'm getting this:
Which model do you want? + Standard,Electrum,CurveHilted, or Tonfa Standard Exception in thread "main" java.lang.ClassNotFoundException: Standard at java.net.URLClassLoader$1.run(URLClassLoader.java:366) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security.AccessController.doPrivileged(Native Method)
So all the errors in the code is fixed but its now got the wrong output
what I get:
Enter numerator; then denominator. 5 8 5/8 Enter numerator; then denominator. 4 10 4/10 Sum:0/0
it should be:
Enter numerator; then denominator. 5 8 5/8 Enter numerator; then denominator. 4 10 4/10 Sum: 82/80 1.025 Product: 20/80 0.25 Enter numerator; then denominator. 6 0 infinity
here is the code
Fraction.java public class Fraction { //declares that it's a class that can be intantiated private int numer; // private intager for numerator private int denom; // private intager for denominator
I have two files - I can get the second one to populate with the first ones data and then delete the first one. I cannot get it to then rename itself to the name of the first file. It also only hits the 'rename' section of the code providing I place system.gc in otherwise it completely skips it.
I am having an issue where the code does something very strange when run. Everything seems to be ok in the code but I don't know what is wrong as no error is given.
Here is the code:
import java.util.Scanner; public class Pizza { private static int pizzaSmall = 10; private static int pizzaMedium = 12; private static int pizzaLarge = 14; private static int costPerTopping = 2; /**@return The total cost of the pizza when given the pizza size and the toppings.*/
[Code] ....
And here is the console output:
Please enter the number of Cheese toppings that you would like: 1 Please enter the number of Pepperoni toppings that you would like: 1 Please enter the number of Ham toppings that you would like: 1 Please enter Small for a Small Pizza, Medium for a Meddium Pizza, and Large for a Large Pizza: The number of Cheese toppings is 1. The number of Pepperoni toppings is 1. The number of Ham toppings is 1.
in my ui i will i will select enabled or disabled then it will go in controller , i already debug it and it goes on the right controller based on what i select on ui my problem is when i select disabled it dont display the message but when i select enabled it displays the message, then i check the databases status is change based on what i select but when i change into disabled doesnt display any message.if select enabled will go in controller then change status into true then update the status then will see the message in ui
I have java http client which sends periodically (every 30 sec; this code is run by heartbeat thread in the cycle) heartbeats:
private PostResponse post(String jSessionCookie, final String action, final String data, final int postTimeoutMs) throws IOException, SSYSException { final HttpURLConnection httpConn = openHttpUrlConnection(true, postTimeoutMs, jSessionCookie); final OutputStream os = httpConn.getOutputStream(); try (final PrintWriter wr = new PrintWriter( DefaultProperty.isEnableSocketTraceGW ? new TracerOutputStream(os) : os ))
[Code] .....
On the server side there is Tomcat 8.0.21 + APR connector. Every time this heartbeat is sent I see in the Wireshark and EtherDetect that new TCP connection is opened (SYN-SYNACK packets) and after getting response from Tomcat connection is closed (FIN – FINACK packets). I was expecting that TCP connections will be reused but not closed.
I want to develop a Java program that uses OpenScript APIs to test my applications. The OpenScript framework automatically creates the Java Code so I was thinking of either using this code or create my own using the APIs.
I tried both options using NetBeans but I'm getting errors everywhere starting with the library import. I'm pretty new to Java so I'm sure I'm missing a lot of things here. I pasted the code below from the OpenScript framework that want to use in a stand-alone file for your reference.,
i have made a phone directory and i have also maintained a database for this. i want on clicking the next button each row from database table display one by one on the GUI into their relevant text Fields. i have written this code , this code show the last row of the table on single click on next button. i want one by one row on each next button click.
you will be making four variables (2 primitive integers and 2 Account Objects). You will be following the steps detailed below. The challenge is to understand exactly what is happening and why. Start by coding the following two methods in a java file.
Static methods: This method can be called whatever you want, however it will be public, static, and void. This method should take in four parameters: w and x which will be integers, then y and z which will be Account Objects.The first thing this method should do is to print out the four variables w, x, y, and z. This should be done in the same manner as you did in the main method. Next, change the first variable (w) to 15. After that, ted bought a new car. He now has only $20,000 in his account. Change the balance of y to be 20,000. Step three is to make a new Account Object named John, he has a balance of $10,000. Assign him to the variable z. Lastly, print all four variables again: w, x, y, and z.
We recently upgraded to JDK 8. Since then, a section of code in a jsp file breaks. The code is this:
ArrayList all = new ArrayList(); final List tsd = timeSeriesBean.getTSData(); all.addAll(tsd); Collections.sort(all, new Comparator() { public int compare(Object o1, Object o2) { TSData t1 = (TSData)o1, t2 = (TSData)o2; int res = t2.getDate().compareTo(t1.getDate());
[code]....
The error message is this:
An error occurred at line: 65 in the jsp file: /TS/VerifyImportTSData.jsp The type new Comparator(){} must implement the inherited abstract method Comparator.thenComparing(Function, Comparator)
64: 65: Collections.sort(all, new Comparator() { 66: public int compare(Object o1, Object o2) { 67: TSData t1 = (TSData)o1, t2 = (TSData)o2; 68: int res = t2.getDate().compareTo(t1.getDate());
just trying to maintain some old java code that I can support until it is rewritten.
i want to use cucumber in java through code. previously i have used it with Junit. but now i need to implement it through coding for the purpose of automating.
I have a new user on my website - it's password protected etc. and I'm just giving them the initial walkthrough. I have a java applet that plots charts and when he goes to this page he gets no chart and at the bottom of the pages there's a bar with the message "Internet Explorer blocked this website from installing an ActiveX control. What's the risk?" and then there's a button to say Install.
I said, it's just for you to permission running the java applet but his IT guy is saying that java doesn't trigger warnings about ActiveX controls so he's nixing the approval.
I have to write Scanner and Parser for the C-Code based on Java and obtain Abstract syntax tree(AST) . I am allowed to use tools like ANTLR, CUP. But i should be able to expand all macros in my code to its basic low level data type like int, boolean and whats the best approach?How to start initially?
I need to access a method from a dll in java as below and is giving an error
"Exception in thread "main" java.lang.UnsatisfiedLinkError: Testdll.Decrypt(Ljava/lang/StringLjava/lang/String; at Testdll.Decrypt(Native Method) at Testdll.main(Testdll.java:31) " I have included the jna-4.0.0.jar and the HashMatchCryptography.dll to the project in eclipe and the java-library-path has the path for the lib
My method below works fine to print a matrix but when it prints every row, it is printing extra 4 white spaces which is not required. How can I delete those extra spaces at the end? when I use
Why can't I see the text when I compile the java code?
Java Code:
import java.io.*; import java.util.logging.Level; import java.util.logging.Logger; import javax.imageio.ImageIO; import javax.swing.*; public class WorldTravel { public static void main (String[] args){ JFrame f = new JFrame("World Travel!"); BG_text p = new BG_text();
I have written a code to get all the nodes below a current Node and it is working but I need to get it to look better if possible. To get the number of nodes below I have created an Array List, which I then go to the first Node below and add all the people to the Array list on the same level till I get to the end of the level, then I go down again until I cannot go down any more. Is there a way I can have my code without having to use an array List? I have put my code below. The brieff about the tree is that you have a parent and below the Parent are children who can have brothers and sisters next to them and after that they also have children below that. The method is trying to find the number of children below any given child
private LinkedList<Node> TempQueue = new LinkedList<Node>(); public int noOfYoungerChildren(Member p1){ Node tmp = find(p1); return countYoungerChildren(tmp);
InputStream inputStream = null; OutputStream outputStream = null; try { URL url = new URL(imgfm); inputStream = url.openStream(); outputStream = new FileOutputStream(imgto); byte[] buffer = new byte[2048]; int length;
[Code] ....
I have several pic to download (e.g 30) however, the code work for some pic (workable for a random number of pic, sometimes workable for 10 pics but sometime can only download 1 pics).
I try to input several println code to found out the problem. finally i found that all the code stop (it's stop as when i use debug process in eclipse, it get no respond) and the final appear code under console is:
