I just wanna print my empty array by for loops.
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 10
What is wrong?
int NYEARS = 5;
int NRATES = 3;
double[][] balancee = new double[NYEARS][NRATES];
for (int i = 0; i < NYEARS; i++) {
for (int j = 0; j < NRATES; j++) {
System.out.print(balance[NYEARS][NRATES] + " ");
System.out.println();
}
}
You should be using the loop indices to access the array elements, not the array dimensions:
for (int i = 0; i < NYEARS; i++) {
for (int j = 0; j < NRATES; j++) {
System.out.print(balance[i][j] + " ");
System.out.println();
}
}
I would prefer generally foreach when I don't need making arithmetic operations with their indices
for (double[] x : balancee) {
for (double y : x) {
System.out.print(y + " ");
}
System.out.println();
}
More importantly, I hope you get why you cannot use balance[NYEARS][NRATES].
Your solution will cause java.lang.ArrayIndexOutOfBoundsException: 5 you have also a typo balance instead you mean balancee:
So Instead you have to use balancee.length and balancee[i].length and not balance[NYEARS][NRATES], so you have to use balancee[i][j] like this :
for (int i = 0; i < balancee.length; i++) {
for (int j = 0; j < balancee[i].length; j++) {
System.out.print(balancee[i][j] + " ");
System.out.println();
}
}
Just use the built-in Arrays.deepToString()
int[][] foo = { null, {}, { 1 }, { 2, 3 } };
System.out.println(Arrays.deepToString(foo));
Output
[null, [], [1], [2, 3]]
int NYEARS = 5; //This is the size
int NRATES = 3; //This is the size
double[][] balancee = new double[NYEARS][NRATES]; //<-- balancee vs balance
for (int i = 0; i < NYEARS; i++) {
for (int j = 0; j < NRATES; j++) {
System.out.print(balance[NYEARS][NRATES] + " "); //<-- use i and j instead of size.
System.out.println();
}
}
