/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
class Ideone
{
	public static void replaceAll(StringBuffer builder, String from, String to)
{
    int index = builder.indexOf(from);
    while (index != -1)
    {
        builder.replace(index, index + from.length(), to);
        index += to.length();
        index = builder.indexOf(from, index);
    }
}
 
	public static void main (String[] args) throws java.lang.Exception
	{
		StringBuffer sb = new StringBuffer("Foo Bar Baz Poo");
		replaceAll(sb, "Bar", "Laa");
		System.out.println(sb);
	}
}

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