marijana_ristova
Junior Member

hey, I want to ask me why this error occurs

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 4
at proekt1.NewClass.main(NewClass.java:44)
Java Result: 1

there is my code


package proekt1;
public class NewClass{
public static void main(String args[]){


int a[]=new int[]{0,0,1,0};
int b[]=new int[]{0,1,1,0};
int S[]=new int [7];
int c[][]=new int[4][4];
int i,f,j,n,p,t;



for(i=1;i<4;i++)
{
for(j=1;j<4;j++)
{
if(a[i]==1 && b[j]==1)//sporedba na cifrite
{
f=1;
}
else
{
f=0;
}
c[i][j]=f;
}
}



System.out.print("Proizvodot na broevite "+a[0]+""+a[1]+""+a[2]+""+a[3]+" i "+b[0]+""+b[1]+""+b[2]+""+b[3]+" e:");//pecatenje na broevite
for(i=1;i<=4;i++)//smestuvanje na dvata broja vo dvodimenzionalna niza
{
System.out.println();
System.out.print(" ");
for(n=0;n<i;n++)
{
System.out.print(" ");
}
for(j=0;j<4;j++)
{
System.out.print(c[i][j]+" ");
}

}

S[7]=c[4][4];
S[6]=(c[3][4]+c[4][3])%2;
p=(c[3][4]+c[4][3]-S[6])/2;
S[5]=(p+c[2][4]+c[3][3]+c[4][2])%2;// sobiranje po modul 2
t=p;
p=0;
p=(t+c[2][4]+c[3][3]+c[4][2]-S[5])/2;
S[4]=(p+c[1][4]+c[3][2]+c[2][3]+c[4][1])%2;
t=p;
p=0;
p=(t+c[1][4]+c[3][2]+c[2][3]+c[4][1]-S[4])/2;
S[3]=(p+c[1][3]+c[2][2]+c[3][1])%2;
t=p;
p=0;
p=(t+c[1][3]+c[2][2]+c[3][1]-S[3])/2;
S[2]=(p+c[1][2]+c[2][1])%2;
t=p;
p=0;
p=(t+c[1][2]+c[2][1]-S[2])/2;
S[1]=(p+c[1][1])%2;
t=p;
p=0;
p=(t+c[1][1]-S[1])/2;
S[0]=p;
for(i=0;i<=7;i++)//pecatenje na proizvodot
{
System.out.print(S[i]+" ");
}

}
}

and i call in this way
String proiz=null;
int pBrojac=0;
System.out.print(ArrayUtils.add(binaren, binaren2));
System.out.println();
System.out.print(ArrayUtils.zeroPad(proiz, pBrojac));
System.out.println();
System.out.print(ArrayUtils.multiply(binaren, binaren2));

I do not know how to fix it and I need to be ready tomorrow

hey, I am new in this forum and i have a big problem. i hope someone will help me..
I need to multiply two float pointing binary number. i wrote something and it work ok if the main class and code is in the same class , f but when i call it from another main class occures this problem

Exception in thread "main" java.lang.IllegalArgumentException
at proekt2.ArrayUtils.lookup(ArrayUtils.java:24)
at proekt2.ArrayUtils.add(ArrayUtils.java:40)
at proekt2.Kraj.main(Kraj.java:188)
Java Result: 1
there is my code
public class ArrayUtils{ static String[] lookupTable = {
"0+0+0=00",
"0+0+1=01",
"0+1+0=01",
"0+1+1=10",
"1+0+0=01",
"1+0+1=10", "1+1+0=10","1+1+1=11", };
public static String lookup(char b1, char b2, char c) {
String formula = String.format("%c+%c+%c=", b1, b2, c);
for (String s : lookupTable) {
if (s.startsWith(formula)) { return s.substring(s.indexOf("=") + 1); }}
throw new IllegalArgumentException(); }
public static String zeroPad(String s, int length) {
while (s.length() < length) {
s = "0" + s; }return s;}
public static String add(String s1, String s2) {
int length = Math.max(s1.length(), s2.length());
s1 = zeroPad(s1, length); s2 = zeroPad(s2, length);
String result = ""; char carry = '0';
for (int i = length - 1; i >= 0; i--) {
String columnResult = lookup(s1.charAt(i), s2.charAt(i), carry);result = columnResult.charAt(1) + result;carry = columnResult.charAt(0); }
if (carry == '1') { result = carry + result;}
return result;}
public static String multiply(String s1, String s2) {
String result = "";
String zeroSuffix = "";
for (int i = s2.length() - 1; i >= 0; i--) {
if (s2.charAt(i) == '1') {
result = add(result, s1 + zeroSuffix);
}
zeroSuffix += "0";
} return result;}}