I'm trying to compare a string to an ArrayList Object. But no matter how I try to compare it, such as just ==, or .equals(), or .compareTo(), or String.valueOf(ArrayList.get()) with all of the above options, it won't compare correctly, even if they are equal when outputted they aren't equal when compared. I can post the whole code if you want me to, it is to have a word <= 5 characters input and rearranged every way possible but not outputting duplicates. I can get the every possible output part but I can't seem to compare the string to an ArrayList object. Thanks in advance for your help.
shdwdrgn517 0 Newbie Poster
shdwdrgn517 0 Newbie Poster
I figured I might as well post the code so i can get some other suggestions on it too...
import cs1.Keyboard;
import java.util.ArrayList;
public class Combinations {
public static void main(String[] args)
{
System.out.println("Enter 5 or less characters to be rearranged:");
String str = Keyboard.readString();
int check = 0;
int not=0;
char[] ch2 = {'a','b'};
char[] ch3 = {'a','b','c'};
char[] ch4 = {'a','b','c','d'};
char[] ch5 = {'a','b','c','d','e'};
ArrayList combos = new ArrayList();
if (str.length()==1)
combos.add(str);
if (str.length()==2)
{
for(int x = 0; x<2;x++)
for (int y = 0; y<2; y++)
{
if(x!=y)
{
ch2[0] = str.charAt(x);
ch2[1] = str.charAt(y);
if( combos.size()!=0)
while (check<combos.size())
{
if (String.valueOf(ch2) == String.valueOf(combos.get(check)))
not = 1;
check++;
}
if (not != 1)
combos.add(String.valueOf(ch2));
check = 0;
not = 0;
}
}
}
if (str.length()==3)
{
for(int x = 0; x<3;x++)
for(int y = 0; y<3;y++)
for (int z = 0;z<3;z++)
{
if (x!=y && x!=z && y!=z)
{
ch3[0] = str.charAt(x);
ch3[1] = str.charAt(y);
ch3[2] = str.charAt(z);
if (combos.size()!=0)
while(check<combos.size())
{
if (String.valueOf(ch3) == String.valueOf(combos.get(check)))
not = 1;
check++;
}
if(not!=1)
combos.add(String.valueOf(ch3));
check =0;
not = 0;
}
}
}
if (str.length()==4)
{
for(int x = 0; x<4;x++)
for(int y = 0; y<4;y++)
for (int z = 0;z<4;z++)
for (int a = 0; a<4;a++)
if (x!=y && x!=z && x!=a && y!=z && y!=a && z!=a)
{
ch4[0] = str.charAt(x);
ch4[1] = str.charAt(y);
ch4[2] = str.charAt(z);
ch4[3] = str.charAt(a);
if (combos.size()!=0)
while(check<combos.size())
{
if (String.valueOf(ch4) == String.valueOf(combos.get(check)))
not = 1;
check++;
}
if(not!=1)
combos.add(String.valueOf(ch4));
check =0;
not = 0;
}
}
if (str.length()==5)
{
for(int x = 0; x<5;x++)
for(int y = 0; y<5;y++)
for (int z = 0;z<5;z++)
for (int a = 0; a<5;a++)
for (int b = 0; b<5; b++)
if (x!=y && x!=z && x!=a && x!=b && y!=z && y!=a && y!=b && z!=a && z!=b && a!=b)
{
ch5[0] = str.charAt(x);
ch5[1] = str.charAt(y);
ch5[2] = str.charAt(z);
ch5[3] = str.charAt(a);
ch5[4] = str.charAt(b);
if (combos.size()!=0)
while(check<combos.size())
{
if (String.valueOf(ch5) == String.valueOf(combos.get(check)))
not = 1;
check++;
}
if(not!=1)
combos.add(String.valueOf(ch5));
check =0;
not = 0;
}
}
for (int x = 0; x<combos.size(); x++)
System.out.println(combos.get(x));
System.out.println("Number of combinations:" + combos.size());
}
}Thanks again
Narue 5,707 Bad Cop Team Colleague
>I'm trying to compare a string to an ArrayList Object.
This is your problem. Unless you can figure out a way to convert the ArrayList to a String so that they are comparable, you'll need to manually compare each item individually in a loop.
shdwdrgn517 0 Newbie Poster
ArrayLists have a .toString method but it calls the String.valueOf() method to translate and I've tried the .valueOf() so I figured the toString wouldn't work any better.
shdwdrgn517 0 Newbie Poster
Nvm, I apparently didn't try .equals(), thought I did. Thanks anyway to those who tried to help
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