Immutable 模式
参考书目《图解Java多线程设计模式》 [日] 结城浩 著
0. 描述了什么事？
一个实例产生后就不发生变化了。
1. 类的说明，如何抽象？
| 类名 | 说明 |
|---|---|
Main |
启动类 |
Person |
描述人的类 |
PrintPersonThread |
打印 Person 类的信息 |
2. 程序示例
1. Main.java
package immutable;
public class Main {
public static void main(String[] args) {
Person alice = new Person("Alice", "Alaska");
new PrintPersonThread(alice).start();
new PrintPersonThread(alice).start();
new PrintPersonThread(alice).start();
}
}
2. Person.java
package immutable;
public final class Person {
private final String name;
private final String address;
public Person(String name, String address) {
this.name = name;
this.address = address;
}
public String getName() {
return name;
}
public String getAddress() {
return address;
}
@Override
public String toString() {
return "Person{" +
"name='" + name + '\'' +
", address='" + address + '\'' +
'}';
}
}
3. PrintPersonThread.java
package immutable;
public class PrintPersonThread extends Thread {
private Person person;
public PrintPersonThread(Person person) {
this.person = person;
}
@Override
public void run() {
while (true) {
System.out.println(Thread.currentThread().getName() + " Print " + person);
}
}
}
