Java 具有两个构造函数的类以不同方式初始化实例变量
具有两个构造函数的类以不同方式初始化实例变量
实例源码：
源代码：
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public class Main {3
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public static void main(String[] args) {// 来自 时代Java - N o w J a v a . c o m5
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// Create two Product objects7
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Product sd1 = new Product();9
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Product sd2 = new Product("QQ", 29.2);11
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// Print details about the two Products14
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sd1.printDetails();16
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sd2.printDetails();18
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// Make them bark21
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sd1.output();23
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sd2.output();25
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// Change the name and price of Unknown Product28
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sd1.setName("AA");30
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sd1.setPrice(321.80);32
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// Print details again35
/*36
来 自*37
时 代 Java - nowjava.com38
*/39
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sd1.printDetails();41
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sd2.printDetails();43
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// Make them bark one more time46
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sd1.output();48
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sd2.output();50
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}52
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}54
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class Product {57
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private String name;59
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private double price;61
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public Product() {64
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this.name = "Unknown";66
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this.price = 0.0;68
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System.out.println("Using Product() constructor");70
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}72
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public Product(String name, double price) {75
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this.name = name;77
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this.price = price;79
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System.out.println("Using Product(String, double) constructor");81
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}83
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public void output() {86
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System.out.println(name + " is here");88
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}90
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public void setName(String name) {93
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this.name = name;95
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}97
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public String getName() {100
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return this.name;102
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}104
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public void setPrice(double price) {107
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this.price = price;109
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}111
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public double getPrice() {114
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