What is the difference between the Boolean & operator and the &&

Question :What is the difference between the Boolean & operator and the &&
operator? (CoreJava)
Answer :If an expression involving the Boolean & operator is evaluated, both
operands are evaluated. Then the & operator is applied to the operand.
When an expression involving the && operator is evaluated, the first
operand is evaluated. If the first operand returns a value of true then the
second operand is evaluated. The && operator is then applied to the first
and second operands. If the first operand evaluates to false, the evaluation
of the second operand is skipped.