Test whether target string is substring of source string
A BUG

Your method fails on string "baaaba" whenever searching for "aab". The problem here is that when you reset pointTarget to 0, you may ignore a prefix of the pattern. 

NAMING

I suggest you rename src to text or string, and rename target to pattern.

CODE

After simplifying your code, you may get something like:

public static boolean isSubstringOf(char string[], char pattern[]) {
    int pointTarget = 0;

    for (int cursor = 0; cursor &lt; string.length; cursor++) {
        if (pointTarget == pattern.length) {
            break;
        }

        if (string[cursor] == pattern[pointTarget]) {
            pointTarget++;
        } else {
            cursor -= pointTarget - 1;
            pointTarget = 0;
        }
    }

    return pointTarget == pattern.length;
}


The above runs in time \$\mathcal{O}(nm)\$, where \$n\$ is the length of the text to search and \$m\$ is the length of the pattern string. If you want to find the pattern in the text in linear time, you could use Knuth-Morris-Pratt algorithm.