help in java?

Question

if you have two strings, and there is an instance of one string in the second string, how do you remove that string? for example, string 1 is, "that snowman rox" and string 2 is "snow", how do you remove "snow" from "that snowman rox?"

Answer 1

You can use the following code for the same:-
/* ------------------------------------------------------------------ */
public class RemoveMatchingString
{
public String removeString(String mainString, String removeString)
{
String newString = mainString;
int removeStringLength = removeString.length();
int removeStringPosition = -1;
do
{
removeStringPosition = newString.lastIndexOf( removeString );
if(removeStringPosition>-1)
{
int currentLength = newString.length();
String tempString = newString.substring(0, removeStringPosition) + newString.substring( removeStringPosition + removeStringLength, currentLength);
newString = tempString;
}
}
while (removeStringPosition>-1);
return newString;
}

public static void main(String [] args)
{
RemoveMatchingString rMString = new RemoveMatchingString();
String mainString = "that snowman rox";
String removeString = "snow";
String newString = rMString.removeString( mainString, removeString);
System.out.println( "mainString: " + mainString );
System.out.println( "removeString: " + removeString);
System.out.println("newString: " + newString);
}
}
/* ------------------------------------------------------------------ */

Answer 2

String in = "that snowman rox";
String regex = "snow";//literal works, but beware of special regex chars
String out = in.replaceAll(regex, "");//replace matches with empty string

//result is out = "that man rox"