集合之使用迭代器（Iterator)遍历集合

使用for循环和while循环进行迭代遍历

自定义类：

public class TestTwo {

	private String name;

	private int age;

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public int getAge() {
		return age;
	}

	public void setAge(int age) {
		this.age = age;
	}

	public TestTwo() {

	}

	public TestTwo(String name, int age) {
		super();
		this.name = name;
		this.age = age;
	}

	@Override
	public String toString() {
		return "TestTwo [name=" + name + ", age=" + age + "]";
	}

	@Override
	
	public boolean equals(Object obj) {
        if(this == obj) {
        	return true;
        }
        if (obj instanceof TestTwo) {
        	TestTwo t=(TestTwo)obj;
        	if(this.name.equals(t.getName())&&this.age==t.getAge()) {
        		return true;
        	}
        			
        }
        return false;
       
        
    }

for循环：

public static void main(String[] args) {
		
		//所有的All方法啊
		Collection c1=new ArrayList();
		c1.add(new TestTwo("Spring",12));
		c1.add(new TestTwo("Summer",12));
		c1.add(new TestTwo("Autumn",12));
		c1.add(new TestTwo("Winter",12));
		
		for(Iterator iter=c1.iterator();iter.hasNext();) {
			TestTwo dt=(TestTwo)iter.next();
			System.out.println(dt.getName()+dt.getAge());
			
		}
	}

while循环：

public static void main(String[] args) {
		
		//所有的All方法啊
		Collection c1=new ArrayList();
		c1.add(new TestTwo("Spring",12));
		c1.add(new TestTwo("Summer",12));
		c1.add(new TestTwo("Autumn",12));
		c1.add(new TestTwo("Winter",12));
		Iterator iter=c1.iterator();
		while(iter.hasNext()) {
			TestTwo dt=(TestTwo)iter.next();
			System.out.println(dt.getName()+dt.getAge());
			
		}
		
		
		
		

	}