La declaración mientras

• continuar: salta la ejecución del resto del cuerpo del ciclo en la iteración actual y salta a la evaluación de la expresión booleana de la instrucción while. Si la expresión se evalúa como verdadera, entonces el bucle continúa.
• break: finaliza inmediatamente la ejecución de la iteración actual y transfiere el control a la primera declaración después del bucle. Por lo tanto, esta instrucción finaliza la ejecución del ciclo actual. Lo consideraremos con más detalle en el próximo artículo.

while (numberOfApplesInBowl > 0) {
    apple = bowl.grabNextApple();
    numberOfApplesInBow--; // "--" is the decrement operator, which reduces the number of apples by one
    if (apple.isBad()) { // This method returns true for rotten apples
        apple.throwInGarbage();
        continue; // Continue the loop. Jump to evaluation of numberOfApplesInBowl > 0
    }
    arrangeInPie(apple.peel().slice());
}

public static void main(String[] args) {
    int sum = 0;  // Total amount
    int i = 0;  // Initial number in the series
    int count = 20;  // Number of numbers
    while (i <= count) {
        i++;  // Get the next number — "i++" is equivalent to "i = i + 1"
        if (i * i <= count)  // If the square of the number is less than
            continue;  // the number of numbers, then we won't calculate the sum
                            // Jump to the next number in the loop
        sum += i * i * i;  // Otherwise, we calculate the sum of the cubes of numbers
    }  // "sum += i * i * i" is notation that is equivalent to "sum = sum + i * i * i"
    System.out.println(sum);  // Print the result
}

Bucle infinito

while (true) {
    // Loop body 
}

public static void main(String[] args) {
    int base = 3; // The number that will be exponentiated
    int result = 1; // The result of exponentiation
    int exponent = 1; // The initial exponent
    while (true) {
        result = result * base;
        System.out.println(base + " raised to the power of " + exponent + " = " + result);
        exponent++;
        if (exponent > 10)
            break; // Exit the loop
    }
}

3 raised to the power of 1 = 3
3 raised to the power of 2 = 9
3 raised to the power of 3 = 27
3 raised to the power of 4 = 81
3 raised to the power of 5 = 243
3 raised to the power of 6 = 729
3 raised to the power of 7 = 2187
3 raised to the power of 8 = 6561
3 raised to the power of 9 = 19683
3 raised to the power of 10 = 59049
Process finished with exit code 0

Bucles anidados

1. Si hay manzanas en el tazón, ejecutamos los pasos 1.1 a 1.4:

   1. 1.1. toma una manzana
   2. 1.2. Pelarlo y cortarlo en rodajas
   3. 1.3. Coloque las rodajas de manzana en la masa de pastel en una sartén.
   4. 1.4. Regrese al paso 1.

1. Número de rebanadas = 0

2. Siempre que el número de cortes sea < 12, realice los pasos 2.1 a 2.3

   1. 2.1. Corta otra rebanada de la manzana.
   2. 2.2. Número de rebanadas++
   3. 2.3. Volver al paso 2

1. Si hay manzanas en el tazón, ejecutamos los pasos 1.1 a 1.6:

   1. 1.1. toma una manzana
   2. 1.2. Pelarla
   3. 1.3. Número de rebanadas = 0
   4. 1.4. Siempre que el número de cortes sea < 12, realice los pasos 1.4.1 a 1.4.3
   1. 1.4.1. Corta otra rebanada de la manzana.
   2. 1.4.2. Número de rebanadas++
   1.4.3. Volver al paso 1.4
   5. 1.5. Coloque las rodajas de manzana en la masa de pastel en una sartén.
   6. 1.6. Regrese al paso 1.

 public static void main(String[] args) {
    // Print the second factors in a row
    System.out.println("    2  3  4  5  6  7  8  9"); 
    int i = 2;  // Assign the first factor to the variable
    while (i < 10) {  // First loop: execute as long as the first factor is less than 10
        System.out.print(i + " | ");  // Print the first factor at the beginning of the line
        int j = 2;  // The starting value of the second factor
        while (j < 10) { // Second loop: execute as long as the second factor is less than 10
            int product = i * j;  // Calculate the product of the factors
            if (product < 10)  // If the product is a single digit, then we print two spaces after the product
                System.out.print(product + "  ");
            else  // Otherwise, print the product and one space after it
                System.out.print(product + " ");
            j++;  // Increment the second factor by one
        }  // Go to the beginning of the second loop, i.e. "while (j < 10)"
        System.out.println();  // Move to the next line on the console
        i++;  // Increment the first factor by one
    } // Go to the beginning of the first loop, i.e. "while (i < 10)"
}

    2  3  4  5  6  7  8  9

2 | 4  6  8  10 12 14 16 18 

3 | 6  9  12 15 18 21 24 27

4 | 8  12 16 20 24 28 32 36

5 | 10 15 20 25 30 35 40 45

6 | 12 18 24 30 36 42 48 54

7 | 14 21 28 35 42 49 56 63

8 | 16 24 32 40 48 56 64 72

9 | 18 27 36 45 54 63 72 81

Process finished with exit code 0