i want overlay 2 strings in java make 1 string. have method this, not want.
for example, if tell overlay "hello world" " hi", " hiorld".
i want able overlay "hello world" " hi", , "hellohiorld"!
here method using:
public static string overlaystring(string str, string overlay, int start, int end) { if (str == null) { return null; } if (overlay == null) { overlay = ""; } int len = str.length(); if (start < 0) { start = 0; } if (start > len) { start = len; } if (end < 0) { end = 0; } if (end > len) { end = len; } if (start > end) { int temp = start; start = end; end = temp; } return new stringbuffer(len + start - end + overlay.length() + 1) .append(str.substring(0, start)) .append(overlay) .append(str.substring(end)) .tostring(); } how method if wanted method avoid replacing characters spaces, still keep positioning of text?
i can thing of 2 ways might able achieve this...
first...
public static string overlay1(string value, string with) { string result = null; if (value.length() != with.length()) { throw new illegalargumentexception("the 2 string's must same length"); } else { stringbuilder sb = new stringbuilder(value); (int index = 0; index < value.length(); index++) { char c = with.charat(index); if (!character.iswhitespace(c)) { sb.setcharat(index, c); } } result = sb.tostring(); } return result; } which allows pass strings of same length , replace "non-whitespace" content of second in first, like...
overlay1("hello world", " hi ")); or specify location want string overlaied, example...
public static string overlay2(string value, string with, int at) { string result = null; if (at >= value.length()) { throw new illegalargumentexception("insert point beyond length of original string"); } else { stringbuilder sb = new stringbuilder(value); // assuming straight replacement out needing // check white spaces...otherwise can use // same type of loop first example sb.replace(at, with.length(), with); result = sb.tostring(); } return result; } overlay2("hello world", "hi", 5)); 