myobject.java

java 教程相应的代码 全是自己写的内附注释 很容易看明白的

package demo.chapter09;

import java.util.Set;

public class MyObject {
	
	private Set<String> set;
	
	public Set<String> getSet() {
		return this.set;
	}
	
	public void changeSetValue(String ... ss) {
		for (String s : set) {
			System.out.println(s);
		}
		for (String s : ss) {
			synchronized (this) {
				if (set.contains(s))
					set.remove(s);
				set.add(s);
			}
		}
	}
	
	public static void main(String[] args) {
		MyObject obj1 = new MyObject();
		MyObject obj2 = new MyObject();
		obj1.changeSetValue();
		obj2.changeSetValue();
	}

}