Thread: does not mesh with two-eimensional array

Wait....I see now.

Your for loop only deals with the if statement after it. It doesn't bother with anything else.

You need brackets around the parts in the for loop.

Also, if that's not what it is, try changing the
++x to an x++ to see if that works.

Looks like it's working to me.

What's the problem?

String[][] classSchedule = { {"CIS 110 ", "ENG 111 ", "MAT 070 ","WEB 110 "},
{"Wen 4:40 ", "Tue 5:40 ", "Mon 1:25 ", "Sat 1:00 "}};

What happens if you change the above to

String[][] classSchedule = { {"CIS 110 ", "ENG 111 ", "MAT 070 ","WEB 110 ",
"Wen 4:40 ", "Tue 5:40 ", "Mon 1:25 ", "Sat 1:00 "}};

when I run the first code I have posted, it tells me if the class exists or not.

when i run the second one, no matter what I have typed, it says it doesnt exist and repeats itself 8 times

First of all, it'd be

if (myClass.equals(classSchedule[x][y])
as it's 2D

I still am baffled as to why it's not working, but I've gotten it to only show it once.

import java.util.*;
import javax.swing.*;
public class Schedule
{
public static void main(String[] args)
{
 
 
String[][] classSchedule =  {{"CIS 110 ", "ENG 111 ", "MAT 070 ","WEB 110 "},
{"Wen 4:40 ", "Tue 5:40 ", "Mon 1:25 ", "Sat 1:00 "}};
String myClass = "";
int x;
int y;
boolean classExists = false;
myClass = JOptionPane.showInputDialog(null, "Enter a class");
for(x = 0; x < classSchedule.length; ++x)
{
for(y = 0; y < classSchedule[x].length; ++y)
 
if(myClass.equals(classSchedule[x][y]))
classExists = true;
 
}
if(classExists)
JOptionPane.showMessageDialog(null, myClass +
" exists");
else
JOptionPane.showMessageDialog(null, myClass +
" does not exist");
}
}

ive found out im supposed to change the format of the array, it needs to have 4 rows and 2 columns. that doesnt change a lot though

package sorting;
 
import java.util.*;
import javax.swing.*;
public class Schedule
{
public static void main(String[] args)
{
 
 
String[][] classSchedule =  new String[][]{{"CIS 110", "ENG 111", "MAT 070","WEB 110"},
{"Wen 4:40", "Tue 5:40", "Mon 1:25", "Sat 1:00"}};
 
for (int v =0; v < classSchedule.length; v++)
{
	for (int w =0; w < classSchedule[v].length; w++)
		System.out.println(classSchedule[v][w]);
}
String myClass = "";
int x;
int y;
boolean classExists = false;
myClass = JOptionPane.showInputDialog(null, "Enter a class");
for(x = 0; x < classSchedule.length; ++x)
{
for(y = 0; y < classSchedule[x].length; ++y)
{
if(myClass.equals(classSchedule[x][y]))
{classExists = true;
 
 
}
 
}
}
System.out.println(classExists);
if(classExists==true)
JOptionPane.showMessageDialog(null, myClass +
" exists");
else
JOptionPane.showMessageDialog(null, myClass +
" does not exist");
}
}

I kinda thought it might be the spaces.

I tried that code as is and got this back

C:\Documents and Settings\Admin\Desktop>java Schedule3
Exception in thread "main" java.lang.NoClassDefFoundError: Schedule3 (wrong name
: sorting/Schedule3)
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java :621)
at java.security.SecureClassLoader.defineClass(Secure ClassLoader.java:12
4)
at java.net.URLClassLoader.defineClass(URLClassLoader .java:260)
at java.net.URLClassLoader.access$000(URLClassLoader. java:56)
at java.net.URLClassLoader$1.run(URLClassLoader.java: 195)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:188)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 07)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 52)
at java.lang.ClassLoader.loadClassInternal(ClassLoade r.java:320)
Could not find the main class: Schedule3. Program will exit.

Get rid of my package class and it'll work.

remove "package sorting;"

Also, if you're calling it tester, it won't recognize it as I've called it Schedule

are you on aim? ive added you because I have further questions

I have AIM, but am not on a computer that I could use it at the moment.

Also, I've currently got it blocked so that only those on my buddy list can IM me. I'll change it later when I get back to my regular computer. I'm using a lab computer right now.

well in that case, I need to modify the program to allow the user to search for a class in the array, and display the time related to that class

Wouldn't it be better to have two parallel 1D arrays than to have a 2D array?

Could somebody help me with my program? It's almost done and I'm stuck and am spending all day when I could be getting it over with, if I weren't waiting patiently all day for help.

Please help. I have several other things I need to get done too in other classes.