In Python, we can use * to repeat a string. For example:
1 2 | "abc" * 3 # "abcabcabc" "h" * 2 # "hh" |
"abc" * 3 # "abcabcabc" "h" * 2 # "hh"
We can use the following Java function to generate a string that repeats s n times.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | public class StringUtils { public static String repeat(String s, int n) { if (1 == s.length()) { var bb = new byte[n]; Arrays.fill(bb, s.getBytes()[0]); return new String(bb); } else { var ret = new StringBuilder(); for (int i = 0; i < n; i++) { ret.append(s); } return ret.toString(); } } } |
public class StringUtils {
public static String repeat(String s, int n) {
if (1 == s.length()) {
var bb = new byte[n];
Arrays.fill(bb, s.getBytes()[0]);
return new String(bb);
} else {
var ret = new StringBuilder();
for (int i = 0; i < n; i++) {
ret.append(s);
}
return ret.toString();
}
}
}For example:
1 | var s = StringUtils.repeat("hello", 2); // "hellohello" |
var s = StringUtils.repeat("hello", 2); // "hellohello"If the given pattern is size of one, we can use Arrays.fill to achieve a much higher performance otherwise we use the StringBuilder to repeat the pattern the given number of times.
–EOF (The Ultimate Computing & Technology Blog) —
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