OnJava8-Examples/reuse/Bath.java at master · xinan-w/OnJava8-Examples · GitHub

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// reuse/Bath.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

// Constructor initialization with composition

class Soap {

private String s;

Soap() {

System.out.println("Soap()");

s = "Constructed";

}

@Override public String toString() { return s; }

}

public class Bath {

private String // Initializing at point of definition:

s1 = "Happy",

s2 = "Happy",

s3, s4;

private Soap castile;

private int i;

private float toy;

public Bath() {

System.out.println("Inside Bath()");

s3 = "Joy";

toy = 3.14f;

castile = new Soap();

}

// Instance initialization:

{ i = 47; }

@Override public String toString() {

if(s4 == null) // Delayed initialization:

s4 = "Joy";

return

"s1 = " + s1 + "\n" +

"s2 = " + s2 + "\n" +

"s3 = " + s3 + "\n" +

"s4 = " + s4 + "\n" +

"i = " + i + "\n" +

"toy = " + toy + "\n" +

"castile = " + castile;

}

public static void main(String[] args) {

Bath b = new Bath();

System.out.println(b);

}

/* Output:

Inside Bath()

Soap()

s1 = Happy

s2 = Happy

s3 = Joy

s4 = Joy

i = 47

toy = 3.14

castile = Constructed

OnJava8-Examples/reuse/Bath.java at master · xinan-w/OnJava8-Examples · GitHub

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