package javacodebook.core.mutablenumber;

public class MutableByte {

    private byte value;

    public MutableByte() {
        value = 0;
    }

    public MutableByte(byte value) {
        this.value = value;
    }

    public void setValue(byte newValue) {
        value = newValue;
    }

    public byte getValue() {
        return value;
    }

    public String toString()
    {
        return ""+value;
    }

    // Die vier Grundrechenarten

    public void add(byte value)
    {
        this.value += value;
    }

    public void sub(byte value)
    {
        this.value -= value;
    }

    public void div(byte value)
    {
        this.value /= value;
    }

    public void mul(byte value)
    {
        this.value *= value;
    }
}

--- Neue Klasse ---

package javacodebook.core.mutablenumber;

public class MutableDouble {

    private double value;

    public MutableDouble() {
        value = 0;
    }

    public MutableDouble(double value) {
        this.value = value;
    }

    public void setValue(double newValue) {
        value = newValue;
    }

    public double getValue() {
        return value;
    }

    public String toString()
    {
        return ""+value;
    }

    // Die vier Grundrechenarten

    public void add(double value)
    {
        this.value += value;
    }

    public void sub(double value)
    {
        this.value -= value;
    }

    public void div(double value)
    {
        this.value /= value;
    }

    public void mul(double value)
    {
        this.value *= value;
    }
}

--- Neue Klasse ---

package javacodebook.core.mutablenumber;

public class MutableFloat {

    private float value;

    public MutableFloat() {
        value = 0;
    }

    public MutableFloat(float value) {
        this.value = value;
    }

    public void setValue(float newValue) {
        value = newValue;
    }

    public float getValue() {
        return value;
    }

    public String toString()
    {
        return ""+value;
    }

    // Die vier Grundrechenarten

    public void add(float value)
    {
        this.value += value;
    }

    public void sub(float value)
    {
        this.value -= value;
    }

    public void div(float value)
    {
        this.value /= value;
    }

    public void mul(float value)
    {
        this.value *= value;
    }
}

--- Neue Klasse ---

package javacodebook.core.mutablenumber;

public class MutableInteger {

    private int value;

    public MutableInteger() {
        value = 0;
    }

    public MutableInteger(int value) {
        this.value = value;
    }

    public void setValue(int newValue) {
        value = newValue;
    }

    public int getValue() {
        return value;
    }

    public String toString()
    {
        return ""+value;
    }

    // Die vier Grundrechenarten

    public void add(int value)
    {
        this.value += value;
    }

    public void sub(int value)
    {
        this.value -= value;
    }

    public void div(int value)
    {
        this.value /= value;
    }

    public void mul(int value)
    {
        this.value *= value;
    }

}

--- Neue Klasse ---

package javacodebook.core.mutablenumber;

public class MutableLong {

    private long value;

    public MutableLong() {
        value = 0;
    }

    public MutableLong(long value) {
        this.value = value;
    }

    public void setValue(long newValue) {
        value = newValue;
    }

    public long getValue() {
        return value;
    }

    public String toString()
    {
        return ""+value;
    }

    // Die vier Grundrechenarten

    public void add(long value)
    {
        this.value += value;
    }

    public void sub(long value)
    {
        this.value -= value;
    }

    public void div(long value)
    {
        this.value /= value;
    }

    public void mul(long value)
    {
        this.value *= value;
    }

}

--- Neue Klasse ---

package javacodebook.core.mutablenumber;

public class MutableShort {

    private short value;

    public MutableShort() {
        value = 0;
    }

    public MutableShort(short value) {
        this.value = value;
    }

    public void setValue(short newValue) {
        value = newValue;
    }

    public short getValue() {
        return value;
    }

    public String toString()
    {
        return ""+value;
    }

    // Die vier Grundrechenarten

    public void add(short value)
    {
        this.value += value;
    }

    public void sub(short value)
    {
        this.value -= value;
    }

    public void div(short value)
    {
        this.value /= value;
    }

    public void mul(short value)
    {
        this.value *= value;
    }

}

--- Neue Klasse ---

package javacodebook.core.mutablenumber;

public class Starter {

    /**
     * Funktioniert wunderbar, da  Die Klasse MutableInteger
     * die entsprechenden set-Methoden hat.
     */
    public static void swap(MutableInteger i1,
                            MutableInteger i2) {
        int tmp = i1.getValue();
        i1.setValue(i2.getValue());
        i2.setValue(tmp);
    }

    /**
     * Funktioniert leider nicht, da die Klasse Integer
     * immutable (nicht veränderbar) ist.
     */
    public static void swap(Integer i1, Integer i2) {
        Integer tmp = i1;
        i1 = i2;
        i2 = tmp;
    }

    /**
     * Funktioniert leider nicht, da die Parameter
     * "by value" übergeben werden
     */
    public static void swap(int i1, int i2) {
        int tmp = i1;
        i1 = i2;
        i2 = tmp;
    }

    public static void main(String args[]) {

        // Parameteruebergabe mit int

        int pi1 = 2;
        int pi2 = 6;

        System.out.println("Vorher: ");
        System.out.println("i1 = " + pi1);
        System.out.println("i2 = " + pi2);

        swap(pi1, pi2);

        System.out.println("Nachher: ");
        System.out.println("i1 = " + pi1);
        System.out.println("i2 = " + pi2);

        // Parameteruebergabe mit Integer

        Integer i1 = new Integer(2);
        Integer i2 = new Integer(6);

        System.out.println("Vorher: ");
        System.out.println("i1 = " + i1);
        System.out.println("i2 = " + i2);

        swap(i1, i2);

        System.out.println("Nachher: ");
        System.out.println("i1 = " + i1);
        System.out.println("i2 = " + i2);

        // Parameteruebergabe mit MutableInteger

        MutableInteger mi1 = new MutableInteger(2);
        MutableInteger mi2 = new MutableInteger(6);

        System.out.println("Vorher: ");
        System.out.println("mi1 = " + mi1);
        System.out.println("mi2 = " + mi2);

        swap(mi1, mi2);

        System.out.println("Nachher: ");
        System.out.println("mi1 = " + mi1);
        System.out.println("mi2 = " + mi2);
    }
}