loops

Review: In lecture, we introduced See while loops. We ended with a (something like):

    static String padWithDots( String msg, int minLength ) {
        String paddedSoFar = msg;
        while (length(paddedSoFar) < minLength) {
            paddedSoFar = paddedSoFar + ".";
            System.out.println( "Debug: paddedSoFar is " + len(paddedSoFar) + " chars long: " + paddedSoFar;
        }
        return paddedSoFar;
    }

We can also use a while-loop to make a copy of a string, where every 'e' is replaced by '3':

    static String leet( String txt ) {
        String leetTxtSoFar = "";
        int nextIndexToCheck = 0;
        
        while (nextIndexToCheck < length(txt)) {
            char nextChar =charAt(txt,nextIndexToCheck); 
            if (nextChar == 'e') {
                leetTxtSoFar = leetTxtSoFar + '3';
            }
            else { 
                leetTxtSoFar = leetTxtSoFar + nextChar;
            }
            nextIndexToCheck = nextIndexToCheck + 1;
            System.out.println( "at loop-bottom: nextIndexToCheck is " + nextIndexToCheck + " and leetTxtSoFar is " + leetTxtSoFar );
        }

        return leetTxtSoFar;
    }

Your task

Write a method which surrounds a string with < and > on each side, until it meets-or-exceeds a given length:

class Lab04cWhile extends Object120 {

    static void testAngleize() {
        assertEquals( "", angleize("",0) );
        assertEquals( "<>", angleize("",2) );
        assertEquals( "<<<hi>>>", angleize("hi",8) );
        assertEquals( "<<<hi>>>", angleize("hi",7) );
        assertEquals( "Mississippi", angleize("Mississippi",3) );
        assertEquals( "bye", angleize("bye",3) );
        assertEquals( "<bye>", angleize("bye",4) );
    }

    static void testAll() {
        testAngleize();
    }

}

Write a function which returns a string like the input, except that each 's' is replaced with '$', and each 'A' with '4'.

    static void testLeetMore() {
        assertEquals( "", "" );

        assertEquals( "z", leetMore("z") );
        assertEquals( "4", leetMore("A") );
        assertEquals( "$", leetMore("s") );

        assertEquals( "hi", leetMore("hi") );
        assertEquals( "z$", leetMore("zs") );
        assertEquals( "$z", leetMore("sz") );
        assertEquals( "4a", leetMore("Aa") );

        assertEquals( "Hiy4", leetMore("HiyA" );
        assertEquals( "p$$$t -- 4bdulla got all 4's.", leetMore("pssst -- Abdulla got all A's.") );
    }

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