Java: Remove String from StringBuilder [duplicate]

Question

This question already has answers here:

How to do the opposite of StringBuilder append in Java? (4 answers)

Closed 8 years ago.

I want to remove String from StringBuilder

Example

String aaa = "sample";
String bbb = "sample2";
String ccc = "sample3";

In another part

StringBuilder ddd = new StringBuilder();
ddd.append(aaa);
ddd.append(bbb);
ddd.append(ccc);

I want to check if StringBuilder ddd contains String aaa and remove it

if (ddd.toString().contains(aaa)) {
    //Remove String aaa from StringBuilder ddd
}

Is that possible? Or is there any other way to do like that?

Answer 1

try this

    int i = ddd.indexOf(aaa);
    if (i != -1) {
        ddd.delete(i, i + aaa.length());
    }

Answer 2

try this

public void delete(StringBuilder sb, String s) {
    int start = sb.indexOf(s);
    if(start < 0)
        return;

    sb.delete(start, start + s.length());
}

Answer 3

Create a string from ddd and use replace().

ddd.toString().replace(aaa,"");

Answer 4

It can be done by :

ddd.delete(from, to);