void test(){
int correct = 0;
int wrong = 0;

if(countF("abcdefgf")==2)
    correct++;
else{
    wrong++ ;
    p("countF(abcdefgf) incorrect result");
}


if(countF("abcdeg")==0)
    correct++;
else{
    wrong++ ;
    p("countF(abcdefgf) incorrect result");
}


if(hasN_Fs("abf,gfdf", 3) == true)
    correct++;
else{
    wrong++ ;
    p("hasN_Fs(\"abf,gfdf\", 3)  =  incorrect ");
}

if(hasN_Fs("abf,gfdf", 2) == false)
    correct++;
else{
    wrong++ ;
    p("hasN_Fs(\"abf,gfdf\", 2)  =  incorrect ");
}

if( threeTimes("abc").equals("abcabcabc"))
    correct++;
else{
    wrong++ ;
    p("threeTimes(\"abc\")  =  incorrect ");
}


if( nTimes("abc",4).equals("abcabcabcabc"))
    correct++;
else{
    wrong++ ;
    p("nTimes(\"abc\", 4)  =  incorrect ");
}



if( countMiddleChar("acbcb" ) ==  2)
    correct++;
else{
    wrong++ ;
    p("countMiddleChar(\"acbcb\" )  =  incorrect ");
}
if( countMiddleChar("bbbbb" ) ==  5)
    correct++;
else{
    wrong++ ;
    p("countMiddleChar(\"bbbbb\" )  =  incorrect ");
}
if( countMiddleChar("xytbtzy" ) ==  1)
    correct++;
else{
    wrong++ ;
    p("countMiddleChar(\"xytbtzy\" )  =  incorrect ");
}

if( indexOf("acxb", "x") == "acxb".indexOf("x"))
    correct++;
else{
    wrong++ ;
    p("indexOf(\"acdxb\", \"x\")  =  incorrect ");
}
if( indexOf("acxb", "z") == "acxb".indexOf("z"))
    correct++;
else{
    wrong++ ;
    p("indexOf(\"acdxb\", \"z\")  =  incorrect ");
}


if( indexOf("acxb", "cx") == "acxb".indexOf("cx"))
    correct++;
else{
    wrong++ ;
    p("indexOf(\"acdxb\", \"cx\")  =  incorrect ");
}

if( countChars("momdadmom" , "dad" ) == 1)
    correct++;
else{
    wrong++ ;
    p("countChars(\"momdadmom\" , \"dad\" )  =  incorrect ");
}
if( countChars("foobofoo" , "foo" ) == 2)
    correct++;
else{
    wrong++ ;
    p("countChars(\"foobofoo\" , \"foo\" )  =  incorrect ");
}
if( countChars("foobofoofoo" , "xy" ) == 0)
    correct++;
else{
    wrong++ ;
    p("countChars(\"foobofoo\" , \"xy\" )  =  incorrect ");
}


String[] toA1 = toArray("abc") ;
if( toA1[0].equals("a")  && toA1[1].equals("b")  && toA1[2].equals("c") )
    correct++;
else{
    wrong++ ;
    p("toArray(\"abc\") incorrect ");
}


toA1 = toArray("xy") ;
if( toA1[0].equals("x")  && toA1[1].equals("y")  )
    correct++;
else{
    wrong++ ;
    p("toArray(\"xy\") incorrect ");
}


toA1 = toArraySansChar("abcadag",'a');
if(toA1[0].equals("b") &&  toA1[1].equals("c") &&  toA1[2].equals("d") && toA1[3].equals("g") )
    correct++;
else{
    wrong++ ;
    p(" toArraySansChar(\"abcadag\",'a') incorrect ");
}




if(isPalindrome("abba"))
    correct++;
else{
    wrong++ ;
    p(" isPalindrome(\"abba\") incorrect ");
}
if(isPalindrome("abxba"))
    correct++;
else{
    wrong++ ;
    p(" isPalindrome(\"abxba\") incorrect ");
}
if(isPalindrome("abxbal") == false)
    correct++;
else{
    wrong++ ;
    p(" isPalindrome(\"abxbal\") incorrect ");
}


String[] s1 = reversedBy2s("abcdef");
if(s1[0].equals("ef"))
    correct++;
else{
    wrong++ ;
    p("reversedBy2s(\"abcdef\")incorrect ");
}
if(s1[1].equals("cd"))
    correct++;
else{
    wrong++ ;
    p("reversedBy2s(\"abcdef\")incorrect ");
}
if(s1[2].equals("ab"))
    correct++;
else{
    wrong++ ;
    p("reversedBy2s(\"abcdef\")incorrect result");
}








p("-------------------------");
p("----------results--------");
p("No correct: " + correct);
p("No wrong: " + wrong);

p("-------------------------");
p("-Getting a perfect score does guarantee not 100, but makes it much more likely");

}




void p(String s){
System.out.println(s);
}

void p(int s){
System.out.println(s);
}
void p(boolean s){
System.out.println(s);
}
void p(double s){
System.out.println(s);
}