Question

I am trying to remove a searched string from an original string(which is an xml file). For this I used the replaceAll function. However I get empty newlines because I used “” for the string to replace. Is there another way to remove a string?

        start =str.indexOf("<opts>");
        end =str.indexOf("</opts>");
        String removeStr = str.substring(start -6, end + 7);
        str = str.replaceAll(removeStr, "");

Tried:

    System.out.println("InitialString :="+str);
    int start = str.indexOf("<opts>");
    int end = str.lastIndexOf("</opts>"); //if \n is added, indent of tag<nos> changes
    str = str.substring(0, start ) + str.substring(end + 7, str.length());
    System.out.println("FinalString :="+str);

Initial Input String :=

<data>
    <param>2</param>
    <unit>1</unit>
    <opts>
        <name>abc</name>
        <venue>arena0</venue>
    </opts>
    <opts>
        <name>xyz</name>
        <venue>arena1</venue>
    </opts>
    <nos>100</nos>
</data>

Final Output String :=

<data>
    <param>2</param>
    <unit>1</unit>

    <nos>100</nos>
</data>

Answer 1

You could do it like this;

int start = str.indexOf("<opts>");
int end = str.indexOf("</opts>\n");
str = str.substring(0, start - 6) + str.substring(end + 8, str.length());