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Replace one string with another string

public class MainClass {    public static void main( String args[] )    {       String firstString = "This sentence ends in 5 stars *****";                 System.out.printf( "Original String 1: %s\n", firstString );       // replace 'stars' with 'carets'       firstString = firstString.replaceAll( "stars", "carets" );       System.out.printf(          "\"carets\" substituted for \"stars\": %s\n", firstString );    } } Original String 1: This sentence ends in 5 stars ***** "carets" substituted for "stars": This sentence ends in 5 carets *****