Java集合框架是Java语言的重要组成部分，它包含了系统而完整的集合层次体系，封装了大量的数据结构的实现，深刻理解Java集合框架的组成结构及其中的实现类和算法，可以极大的提高程序员编码的能力。
import java.util.*;
public class Test{
public static void main(String[] args){
Collection c=new ArrayList();
c.add("hello");
c.add(new Name("f1","11"));
c.add(new Integer(100));
System.out.println(c.size());
System.out.println(c);
}
}
import java.util.*;
public class BasicContainner{
public static void main(String[] args){
Collection c=new HashSet();
c.add("hello");
c.add(new Name("f1","11"));
c.add(new Integer(100));
c.remove(new Integer(100));
System.out.println(c.remove(new Name("f1","11")));
System.out.println(c);
}
}
class Name{
private String firstName,lastName;
public Name(String firstName,String lastName){
this.firstName=firstName;
this.lastName=lastName;
}
public String getFirstName(){return firstName;}
public String getLastName(){return lastName;}
public String toString(){return firstName + " " + lastName;}
public boolean equals(Object obj){
if(obj instanceof Name){
Name name=(Name) obj;
return(firstName.equals(name.firstName))&&(lastName.equals(name.lastName));
}
return super.equals(obj);
}
public int hashCode(){
return firstName.hashCode();
}
}
import java.util.*;
public class MyHashMap{
public static void main(String[] args){
HashMap hm=new HashMap();
hm.put(1,'Z');
hm.put(2,'H');
hm.put(3,'O');
hm.put(4,'U');
System.out.print("添加元素后结果为：");
System.out.println(hm);
hm.remove(3);
hm.put(2,"替换");
System.out.print("删除和替换元素后的结果：");
System.out.println(hm);
}
}
原文地址：http://blog.csdn.net/zhou2s_101216/article/details/46516147
