public String decode(String a,String b){
        CharSequence[] text={"a","b","c","d","e","f","g","h","i","j","k","l","m","n"
            ,"o","p","q","r","s","t","u","v","w","x","y","z"};
        String[] morze={".-","_...","_._.","_..",".",".._.","__.","...."
                ,"..",".___","_._","._..","__","_.","___",".__.","__._","._."
                ,"...","-",".._","..._",".__","_.._","_.__","__.."};
        for(int i=0;i<text.length;i++){
            if(a.contains(text[i])){
                b+=morze[i];
            }
        }
        System.out.println(":"+b);
        return b;
    }
}

public void actionPerformed(ActionEvent e) {
        String a=textText.getText();
        String b1="";
        d.decode(a, b1);

        System.out.println(b1);
        morzeText.setText(b1);
        s.play();
    }

});