60 lines
1.2 KiB
Java
60 lines
1.2 KiB
Java
// reuse/Bath.java
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// (c)2021 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Constructor initialization with composition
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class Soap {
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private String s;
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Soap() {
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System.out.println("Soap()");
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s = "Constructed";
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}
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@Override public String toString() { return s; }
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}
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public class Bath {
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private String // Initializing at point of definition:
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s1 = "Happy",
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s2 = "Happy",
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s3, s4;
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private Soap castile;
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private int i;
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private float toy;
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public Bath() {
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System.out.println("Inside Bath()");
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s3 = "Joy";
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toy = 3.14f;
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castile = new Soap();
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}
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// Instance initialization:
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{ i = 47; }
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@Override public String toString() {
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if(s4 == null) // Delayed initialization:
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s4 = "Joy";
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return
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"s1 = " + s1 + "\n" +
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"s2 = " + s2 + "\n" +
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"s3 = " + s3 + "\n" +
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"s4 = " + s4 + "\n" +
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"i = " + i + "\n" +
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"toy = " + toy + "\n" +
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"castile = " + castile;
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}
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public static void main(String[] args) {
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Bath b = new Bath();
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System.out.println(b);
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}
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}
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/* Output:
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Inside Bath()
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Soap()
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s1 = Happy
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s2 = Happy
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s3 = Joy
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s4 = Joy
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i = 47
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toy = 3.14
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castile = Constructed
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*/
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