Save Logical Expressions In Java
Feb 3, 2015How to save (condion1 & condition2) | condition3 |(Condition5 & condition6) etc in database and how to retrieve it.
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Integer Variables - Which Three Logical Expressions Are Equivalent To Each Other
Apr 12, 2014Assuming that x, y, and z are integer variables, which of the following three logical expressions are equivalent to each other, that is, have equal values for all possible values of x, y, and z?
(x == y && x != z) || (x != y && x == z)
(x == y || x == z) && (x != y || x != z)
(x == y) != (x == z)
None of the three
A. I and II only
B. II and III only
C. I and III only
D. I, II, and III
I selected B, but got it wrong. I really think I need understanding boolean logic. The correct answer says something else but I don't get the logic. Here is the correct answer:
Answer Key : The following model answer has been provided to you by the grader. Carefully compare your answer with the one provided here.
Expression III is the key to the answer: all three expressions state the fact that exactly one out of two equalities, x == y or x == z, is true. Expression I states that either the first and not the second or the second and not the first is true. Expression II states that one of the two is true and one of the two is false. Expression III simply states that they have different values. All three boil down to the same thing. The answer is E.
In exercise 4, I get the same problem:
The expression !((x <= y) && (y > 5)) is equivalent to which of the following?
A. (x <= y) && (y > 5)
B. (x <= y) || (y > 5)
C. (x >= y) || (y < 5)
D. (x > y) || (y <= 5)
E. (x > y) && (y <= 5)
Exercise 4
ABCDE
Incorrect
Score: 0 / 1
Submitted: 2/10/2014 8:21pm
Your answer is incorrect.
Answer Key
The following model answer has been provided to you by the grader. Carefully compare your answer with the one provided here. The given expression is pretty long, so if you try to plug in specific numbers you may lose a lot of time. Use De Morgan's Laws instead:
!((x <= y) && (y > 5))
!(x <= y) || !(y > 5)
When ! is distributed,
&& changes into ||, and vice-versa
(x > y) || (y <= 5)
Java Servlet :: How To Force Browser To Open / Save / Save As File From Server
Sep 25, 2012How to force browser to open/save/save as the file from server instead of browser cache.
I am creating a csv file through a pl/sql procedure and forwarding the link to user once user clicks on link he downloads the file, however if the same thing is repeated then browser returns the old cached file instead of new file generated on server.
Java Expressions With Multiple Operators
Jan 11, 2014Following are the expressions? I tried running them and those are the answers I got. However, I cannot figure out the working.
//c = ++a + a++ - --a - a-- + a * + a/a ; //ans is 10
//c= a* + a/a ; ans. is 1.
//c= a * +3 ; //ans is 30
//c =5+ a* +2; //25
// c= 5+ a* + a/a ; //ans. is 15.
Java Regular Expressions - Simple Search And Replace
Mar 1, 2014I want to do a simple search and replace regular expression of lines. I am very unfamilar with Java regular expressions, and I'm not sure how to do something as simple as what I want to do. I have lines that look like this...
Java Code : access_log /home/%USER%/access_log mh_sh_highlight_all('java');
I want them changed so %USER% changes to a string, such as "cyrus," so they appear like this ...
Java Code: access_log /home/cyrus/access_log mh_sh_highlight_all('java');
The reason I want to use regular expressions is because I want to use the replaceAll method of the java.lang.String object. If I use replace I have to convert my strings into char arrays, and my code becomes bulky.
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Dec 22, 2014i am not able to save .java file. it says need administrator access, but i am logged in as an administrator account.
View Replies View RelatedLogical Error With Else If Statement?
Aug 12, 2014I was almost finished with my program when I noticed I had a big logical error. At the very beginning of my else if statements I would jump down to my else statement.
Java Code:
import java.util.Scanner;
public class InternetServiceProviderNew
{
public static void main(String[] args) {
double packageA, packageB, packageC, extraA, extraB, userHours, aHours, bHours, cHours, userCharges;
packageA = 9.95; packageB = 13.95; packageC = 19.95; aHours = 10; bHours = 20;
String userPackage, A, B, C ;
[code]....
Stuck With A Logical Error
Jan 23, 2015 import java.awt.FlowLayout;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JTextField;
[code]....
Total IS those numbers. But question[10] will not cooperate with me and it's getting a bit aggravating as I can't find a logical reason for it to be doing that.how to perhaps lock the value of total and sTotal after 10 button clicks from any?
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These are my code ...
import javax.swing.text.html.parser.*;
import javax.swing.text.html.*;
import javax.swing.text.*;
import java.io.*;
import java.util.StringTokenizer;
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[Code] ......
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Oct 22, 2014I want to do an app that capture a selected area of a screen and save it. I did a few research and i did the code down below.
My questions are:
1 - How can i open a pdf file in this app ? (i tried use a method but it didnt work. I dont know exactly where to put it on the code)
2 - How can i save the selected area in a new file ? (a image file : JPEG, JPG,png)
3 - [the complex part] right now, the code only "save" one selected area each time. I want to capture a lot of parts of screen and save this in the same image file. one beside the other. How can i do this ?
Java Code: package javaapplication39;
import java.awt.*;
import java.awt.event.*;
import java.awt.image.*;
import javax.swing.*;
public class ScreenCaptureRectangle {
Rectangle captureRect;
ScreenCaptureRectangle(final BufferedImage screen) {
[Code] .....
Truth Table For Logical Operators
Nov 11, 2014I've created a truth table for logical operators. Now I'm supposed to alter the code so the table prints 1's and 0's instead of true or false. Here's a bit of the original code - just the header and the first line of the table.
System.out.println("p q AND OR XOR NOT");
System.out.println();
boolean p, q;
p = true; q = true;
System.out.print( p + " " + q + " " );
System.out.print( ( p & q) + " " + ( p | q) + " ");
System.out.println(( p ^ q ) + " " + ( !p) );
All of my ideas involve using an if-then statement, but that would be all kinds of inefficient and unwieldy, I think.
Nested If / Else - Cannot Determine Logical Mistake
Jan 5, 2015The title says already where my difficulties are. I forgot to say, the "S" printing part works, but why the others doesn't. To make it more clear:
java Monoton 1 3 3 4 & java Monoton 1 3 4 1
=> nothing (my output)
I forgot to notice, with 1 3 3 4 as parameters it jumps out at if (b < c), which is expected. but it jumps out of the whole if instead just run the else part. that's the essence of my problem.
The Exercise:
=> The program should print the following letters;
S, if every number is true bigger than the before,
M, if every number is bigger or equal than the before,
N in the other cases
Examples (from the exercise)
=> java Monoton 0 1 2 4
S
=> java Monoton 1 3 3 4
M
=> java Monoton 1 3 4 1
N
The Exercise should done without the use of logical operators or other combined requirements.
Java Code:
public class Main {
public static void main(String[] args) {
int a = Integer.parseInt(args[0]);
int b = Integer.parseInt(args[1]);
int c = Integer.parseInt(args[2]);
int d = Integer.parseInt(args[3]);
[Code] .....
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import java.util.Scanner;
public class P5A
{
public static void main (String args[]) {
System.out.println( "Always Show" );
Scanner reader = new Scanner(System.in);
[Code] .....
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public static boolean checkSSN(String social) {
boolean valid = false;
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[code]...
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${(2+3)-1}
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I wanted to do the following in EL
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using
String inputString=in.next();
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If the answer is regular expressions then What Should be Its Regular expressions?
Regular Expressions For Range Statements
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_G7120+1#=K,
_G7132+_G7133#=_G7120,
_G7144+_G7145#=_G7132,
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byte b;
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[Code] ....
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List<ArrayList>valores=new ArrayList();
...
ArrayList valorPrimeiro=valores.get(0);
int primeiroTam =((ArrayList)valorPrimeiro.get(0)).size()+1;
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${status.errorMessages}
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Student.java
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
class Student extends Frame implements ActionListener {
String greeding="";
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[Code] .....
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uploadfromtaptalk1407333378833.jpg
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To be more specific:
For my project I use the Spring Tool Suite.
I want to be able to enter a URL in a browser.. something like "localhost:8080/test?name=Root". When I hit Enter a page will be displayed showing "Hello Root" if the name in the URL is Root or "Hello User" for any other name.
I accomplish that with this code:
Java Code:
String UserName = "Empty";
@RequestMapping("/test")
public @ResponseBody String username(@RequestParam(value="name")String name){
if (name == "Root")
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else
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return UserName;
} mh_sh_highlight_all('java');
My problem is that it if I enter Root as a name in the URL it doesn't recognize it and it shows "Hello User".
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How exactly I should reform this code in order to make it work?