I'm quite new to Java, but getting into it. However, I can't wrap my head around why this example, which I found here, does not work:
At start of class:
String[][] spritesPaint = new String[20][20];
In method:
for (int funct1 = 0; funct1 <= 2; funct1++) {
if (funct1 == 0) {
for (int funct2 = 0; funct2 < rEnemyNumber; funct2++) {
spritesPaint[0][funct2] = new Integer(rEnemyY[funct2])
.toString();
spritesPaint[1][funct2] = rEnemyGraphic[funct2];
}
} else if (funct1 == 1) {
Arrays.sort(Integer.valueOf(spritesPaint[0].toString()),
new Comparator<Integer[]>() {
@Override
public int compare(final Integer[] entry1,
final Integer[] entry2) {
final Integer time1 = entry1[0];
final Integer time2 = entry2[0];
return time1.compareTo(time2);
}
});
} else if (funct1 == 2) {
for (int funct3 = 0; funct3 < rEnemyNumber; funct3++) {
if (rEnemyCheck[funct3] == true) {
nextPaint = getImage(base, rEnemyGraphic[funct3]);
System.out.println("Next: " + nextPaint);
g.drawImage(nextPaint, rEnemyX[funct3] + worldCenterX,
rEnemyY[funct3] + worldCenterY, this);
}
}
}
}
Basically, what I want to do is have a two dimensional array where I store Y position of object on the screen and an image path also related to that object, then sort it by the Y position integer. This should allow me to paint elements to the screen in the correct order for an isometric perspective.
However, I keep getting this error:
The method sort(T[], Comparator<? super T>) in the type Arrays
is not applicable for the arguments (Integer, new Comparator<Integer[]>(){})
Please help me, I've been twisting my brain for hours trying to understand why I get this error now.
Integer.valueOf(spritesPaint[0].toString())
is a single integer, however from your description it seems that you want to sort the strings in the 1-dimensional array spritesPaint[0]
as if they were integers. Here is a modification that will do just that:
Arrays.sort(spritesPaint[0], new Comparator<String>() {
@Override public int compare(final String entry1, final String entry2) {
final Integer time1 = Integer.valueOf(entry1);
final Integer time2 = Integer.valueOf(entry2);
return time1.compareTo(time2);
}
});
Alternatively, if you are trying to sort the first dimension of the array by the first element of the second dimension of the array, modify as follows:
Arrays.sort(spritesPaint, new Comparator<String[]>() {
@Override public int compare(final String[] entry1, final String[] entry2) {
final Integer time1 = Integer.valueOf(entry1[0]);
final Integer time2 = Integer.valueOf(entry2[0]);
return time1.compareTo(time2);
}
});
The error message means that, instead of passing an Array of type T (generic), you are passing an Integer. So, where you have:
Arrays.sort(Integer.valueOf(spritesPaint[0].toString()), ...
you want to pass in
Arrays.sort(arrayToBeSorted, ...
(Also, your variables could do with better names because I really don't understand what this example is doing...)
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