Wildcard Replaceable With Letters

Oct 17, 2014

While using generics, are there cases when ? wildcard cannot be replaced with letters [A-Z]? So far , I was able to find only one case, it is when you want to have field pointing on generic instance without making class generic.

class OneClass {
private LinkedList<?> myLL;
}

In case above, as I understand, you cannot use [A-Z] without generalize OneClass. Are there any other cases, when there is no way except to use ? wildcard instead of letter [A-Z]?

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GUI Program To Convert All Lowercase Letters In A String To Uppercase Letters

Mar 21, 2015

Write a GUI program to convert all lowercase letters in a string to uppercase letters, and vice versa.

For example, Alb34eRt will be converted to aLB34ErT.

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Generics Wildcard Array Of References?

Jul 27, 2014

An array of references to a specific generic type is not allowed in Java.

e.g.,

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is not allowed though the type checkng and memory allocation can be done at the compile time itself.

Instead of this, Java allows to use Wildcard type array of references to a generic type.

e.g.,

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Jul 31, 2014

The followings are what I see just now.....
//******************************************
Ambiguities

Wildcard imports have one problem though: they can lead to ambiguities when classes with the same name exist in two packages you import via wildcard.

Imagine the following two imports:

import foo.*;
import bar.*;

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How To Replace Letters

Oct 15, 2014

I can't figure out why my code doesn't work. My task is to replace for example ä=>ae, using this method String.charAt(int index). So here is my code:

public class pich {
public static void main(String[] args) {
String text = "Die süße Hündin Leica läuft in die Höhle des fülligen Bären "+
"Iliyan (ein Übergrößenträger), der sie zum Teekränzchen eingeladen hat."+
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String textOhneUmlaute = "";

[Code] ....

when I launch my code I get the same String and nothing has changed

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String s;

[Code] .....

PROGRAM OUTPUT:
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package pkg2911homework.pkg1;
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner keys = new Scanner(System.in);

[Code] ....

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Dec 4, 2014

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then i get:

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at java.util.Scanner.throwFor(Scanner.java:840)
at java.util.Scanner.next(Scanner.java:1461)
at java.util.Scanner.nextInt(Scanner.java:2091)
at java.util.Scanner.nextInt(Scanner.java:2050)
at Week7.Task3.filereader(Task3.java:25)
at Week7.Task3.main(Task3.java:14)

my code is as follows

package testing;
 
import java.util.*;
import java.io.File;
import java.io.IOException;
public class summingInts {
public static void main(String[] args)
throws IOException {
Scanner textfile = new Scanner(new File("intSum.txt"));

[code]....

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Nov 19, 2014

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VVVVV
VVV
V
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X X
X
X X
X X
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O
O O
O O
O O
O

My problem is, that I've always been bad at figuring out the logic behind these.

I can kinda' see it (somewhat) in my head though... I'd need a double for-loop which depend on the sizes, one that monitors the spaces and one that monitors the symbols, with some conditionals in there. How to make symbols like this, using letters, in Java.

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Oct 19, 2014

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{
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[Code].....

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Sep 2, 2014

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How To Ignore Lowercase And Uppercase Letters

Oct 18, 2014

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Java Code:

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My current code:

import java.util.Scanner;
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public static void main(String[]args){
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System.out.print("Enter two characters: ");
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[Code] .....

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Dec 22, 2014

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class Main
{
public static void main(String args[]) {
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String text = BIO.getString();
 
[code]...

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Aug 20, 2014

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import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Scanner;
public class Lower {
Scanner in=new Scanner(System.in);
FileWriter filw;
String fr;

[Code] .....

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Mar 4, 2015

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import java.io.ByteArrayOutputStream;
import java.io.FilterReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.Reader;
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[Code] .....

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package v0502;
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Jan 25, 2015

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I've tried everything in my power but I am missing something. Here is my code.

public static String makeAWord(String word, String letters){
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[Code] ....

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package pkg4333_hwk1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

class Main {

[Code] ....

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com.sun.webkit.WebPage

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[Code] ....

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Jan 27, 2015

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The board is supposed to look something like this to the viewer of the program, but they need to guess the letters that are hidden in the characters. :

* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *
* * * * * * * * * * * * * *

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* * E P I S O D E * I V * *
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* * * * * * * * * * * * * *

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So this is the board that's used to display the concealed letter, and there a list of the hidden letters below, like hangman.

import java.util.Scanner;
public class wheelof{
public static Scanner keyboard = new Scanner(System.in);
public static String puzzle1 = "";
public static String puzzle2 = "";
public static String puzzle3 = "";
public static String bonpuzzle = "";
public static String category1 = "";
public static String category2 = "";
 
[Code] ....

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