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import java.util.Arrays;
import java.util.stream.Collectors;
public class Ch2 {
public static String joined(int[] ints) {
// we're using it more than once, make it a method
return Arrays.stream(ints)
.mapToObj(String::valueOf)
.collect(Collectors.joining(", "));
}
public static int[] duplicateZeros(int[] ints) {
for (int i = 0; i < ints.length; i++) {
if (ints[i] == 0) {
// shift all the values in the array to the right by one
for (int j = ints.length - 1; j > i; j--) {
ints[j] = ints[j - 1];
}
ints[i + 1] = 0; // insert a new 0
i++; // skip over the 0 we added!
}
}
return ints;
}
public static void solution(int[] ints) {
System.out.println("Input: @ints = (" + joined(ints) + ")");
ints = duplicateZeros(ints);
System.out.println("Output: (" + joined(ints) + ")");
}
public static void main(String[] args) {
System.out.println("Example 1:");
solution(new int[] {1, 0, 2, 3, 0, 4, 5, 0});
System.out.println("\nExample 2:");
solution(new int[] {1, 2, 3});
System.out.println("\nExample 3:");
solution(new int[] {0, 3, 0, 4, 5});
}
}
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