boolean condition not working

I'm trying to write a program that reads a String written by the user and checks if a word has only one type of vowel(for example: eye, wifi, cap...). I have one boolean for each vowel and when read a word, if the readen char is an 'e' I set the boolean itsE to true, and the same for the other vowels. The problem is that I thought that with an if and the condition: "if boolean itsE it's true and all the others are false, I print that word" but it never enters the if. Any suggestions?

Note: LT IS A GIVEN CLASS TO READ CHAR SEQUENCES

public class voweltype {
    static final char BLANK=' ';
    static final char FINAL='.';
    static final int MAX=20;
    static LT in= new LT();
    static char caracter;
    static char [] word=new char[MAX];
    static int numchars;

    public static void main(String[]args) throws Exception{

        boolean itsA, itsE, itsI, itsO, itsU;
        System.out.print("INTRODUCE your text: ");
        char=in.readcharSequence();

        while (char== BLANK) {
            char= in.readcharSequence();
        }

        while(char!=FINAL){
            numchars=0;
            itsA=false;
            itsE=false;
            itsI=false;
            itsO=false;
            itsU=false;
            while ((char!=FINAL)&&(char!=ESPACIO)) {
                word[numchars]=char;
                numchars++;
                if(char=='a'){
                    itsA=true;
                } 

                if(char=='e'){
                    itsE=true;
                } 
                if(char=='i'){
                    itsI=true;
                } 
                if(char=='o'){
                    itsO=true;
                }  
                if(char=='u'){
                    itsU=true;
                } 



                char=in.readcharSequence();

            } 

            System.out.println();
            System.out.println(itsA);
            System.out.println(itsE);
            System.out.println(itsI);
            System.out.println(itsO);
            System.out.println(itsU);
            System.out.println("outside if");

            if(((esA=true)&&(esE=false)&&(esI=false)&&(esO=false)&&(esU=false))||
                ((esA=false)&&(esE=true)&&(esI=false)&&(esO=false)&&(esU=false))||
                ((esA=false)&&(esE=false)&&(esI=true)&&(esO=false)&&(esU=false))||
                ((esA=false)&&(esE=false)&&(esI=false)&&(esO=true)&&(esU=false))||
                ((esA=false)&&(esE=false)&&(esI=false)&&(esO=false)&&(esU=true))){

                System.out.println("inside if");

                for(int i=0;i<numchars;i++){
                    System.out.print(word[i]);
                }
                System.out.println();


            }


            while (char== ESPACIO) {
            char=in.readcharSequence();
        }





        }
    }    
}