Several ways to create and destroy objects in Java __java

several ways to create objectsConstructor static factory method via Builder
Instead of directly generating the desired object, the client invokes the constructor with all the necessary parameters to get a Builder object, and then the client invokes a setter-like method on the builder object to set each optional parameter and finally the parameterless build () on the client. method to build the object. The following is a simple example:

Builder pattern public class nutritionfacts{private final int servingsize;
    private final int servings;
    private final int calories;
    private final int fat;
    private final int sodium;


    private final int carbohydrate;
        public static class builder{//required private final int servingsize;

        private final int servings;
        Optional private int calories = 0;
        private int fat = 0;
        private int sodium = 0; private int Carbohydrate =0 public Builder (int servingsize, int servings) {this.servingsize = serving
            Size;
        This.servings=servings;
            Public Builder calories (int val) {calories=val;
        return this;
            Public Builder fat (int val) {fat=val;
        return this;
            Public Builder Sodium (int val) {sodium=val;
        return this; } public Builder carbohydrate (int vaL) {carbohydrate=val;
        return this;
        //build construct object public nutritionfacts built () {return new nutritionfacts (this);
        } private Nutritionfacts (Builder Builder) {servingsize = builder.servingsize;
        servings = builder.servings;
        calories = builder.calories;
        Fat = Builder.fat;
        Sodium = Builder.sodium;
    Carbohydrate = builder.carbohydrate; The//client invokes Nutritionfacts CocaCola = new Nutritionfacts.builder (8). Calories (m). Sodium (a). Carbohydrate (27). Build ();