Solución Ejercicio 1
public class Ejercicio1 {

    public static void main(String[] args) {
        int N = 5;
        double A = 4.56;
        char C = 'a';
        System.out.println("Variable N = " + N);
        System.out.println("Variable A = " + A);
        System.out.println("Variable C = " + C);
        System.out.println(N + " + " + A + " = " + (N+A));
        System.out.println(A + " - " + N + " = " + (A-N));
        System.out.println("Valor numérico del carácter " + C + " = " + (int)C);
    }
}
Solución Ejercicio 2
public class Ejercicio2 {

    public static void main(String[] args) {
        int X = 1, Y = 2;
        double M = 3.2, N = 4.7;
        System.out.println("Variable X = " + X);
        System.out.println("Variable Y = " + Y);
        System.out.println("Variable M = " + M);
        System.out.println("Variable N = " + N);
        System.out.println(X + " + " + Y + " = " + (X+Y));
        System.out.println(X + " - " + Y + " = " + (X-Y));
        System.out.println(X + " * " + Y + " = " + X*Y);
        System.out.println(X + " / " + Y + " = " + X/Y);
        System.out.println(X + " % " + Y + " = " + X%Y);
        System.out.println(N + " + " + M + " = " + (N+M));
        System.out.println(N + " - " + M + " = " + (N-M));
        System.out.println(N + " * " + M + " = " + N*M);
        System.out.println(N + " / " + M + " = " + N/M);
        System.out.println(N + " % " + M + " = " + N%M);
        System.out.println(X + " + " + N + " = " + (X+N));
        System.out.println(Y + " / " + M + " = " + Y/M);
        System.out.println(Y + " % " + M + " = " + Y%M);
        System.out.println("Variable X = " + X + " el doble es " + 2*X);
        System.out.println("Variable Y = " + Y + " el doble es " + 2*Y);
        System.out.println("Variable M = " + M + " el doble es " + 2*M);
        System.out.println("Variable N = " + N + " el doble es " + 2*N);
        System.out.println(X + " + " + Y + " + " + N + " + " + M + " = " + (X+Y+M+N));
        System.out.println(X + " * " + Y + " * " + N + " * " + M + " = " + (X*Y*M*N));
    }
}
Solución Ejercicio 3
public class Ejercicio3 {
    public static void main(String[] args) {
        int N = 1;
        System.out.println("Valor inicial de N = " + N);
        N+=77;
        System.out.println("N + 77 = " + N);
        N-=3;
        System.out.println("N - 3 = " + N);
        N*=2;
        System.out.println("N * 2 = " + N);
    }
}

Solución Ejercicio 4

public class Ejercicio4 {
    public static void main(String[] args) {
        int A = 1, B = 2, C = 3, D = 4, AUX;
        System.out.println("Valores iniciales");
        System.out.println("A = " + A);
        System.out.println("B = " + B);
        System.out.println("C = " + C);
        System.out.println("D = " + D);
        AUX = B;
        B = C;
        C = A;
        A = D;
        D = AUX;
        System.out.println("Valores finales");
        System.out.println("B toma el valor de C -> B = " + B);
        System.out.println("C toma el valor de A -> C = " + C);
        System.out.println("A toma el valor de D -> A = " + A);
        System.out.println("D toma el valor de B -> D = " + D);
    }
}

Solución ejercicio 5

public class Ejercicio5 {
    public static void main(String[] args) {
        int A = 15;
        System.out.println(A + (A%2==0 ? " es par " : " es impar "));
    }
}

Solución Ejercicio6

public class Ejercicio6 {
    public static void main(String[] args) {
       int B = -1;
       System.out.println(B + (B >= 0 ? " es positivo " : " es negativo "));
    }
}

Solución Ejercicio7

public class Ejercicio7 {
    public static void main(String[] args) {
       int C = 55;
       System.out.println(C + (C >= 0 ? " es positivo " : " es negativo "));
       System.out.println(C + (C%2== 0 ? " es par " : " es impar "));
       System.out.println(C + (C%5== 0 ? " es múltiplo de 5 " : " no es múltiplo de 5 "));
       System.out.println(C + (C%10== 0 ? " es múltiplo de 10 " : " no es múltiplo de 10 "));
       System.out.println(C + (C>100 ? " es mayor que 100 " : " es menor que 100 "));
    }
}

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