℡。sc 9:58:21 1.HashMap<Person,Person> 2.HashMap<String,String> ℡。sc 9:58:48 分别用keySet+增强for,keySet+迭代器遍历

package zuoyeDemo02;

public class Persons {
 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 Persons(String name, int age) {
	super();
	this.name = name;
	this.age = age;
}
public Persons() {
	super();
}
@Override
public String toString() {
	return "Persons [name=" + name + ", age=" + age + "]";
}
 
}

　　

package zuoyeDemo02;

public class Personss {
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;
}
@Override
public String toString() {
	return "Personss [name=" + name + ", age=" + age + "]";
}
public Personss(String name, int age) {
	super();
	this.name = name;
	this.age = age;
}
public Personss() {
	super();
}

}

　　

package zuoyeDemo02;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;

public class Demo033 {
 public static void main(String[] args) {
	HashMap<Persons, Personss> ha=new HashMap<Persons, Personss>();
	ha.put(new Persons("a",10),new Personss("b",20));
	ha.put(new Persons("b",15), new Personss("a",19));
	ha.put(new Persons("c",15), new Personss("d",19));
//	遍历keySet+增强for
//	1.获取所有key所在的Set集合
	Set<Persons> ste= ha.keySet();
//	遍历set得到key每一个值
	for(Persons s:ste){
		System.out.println(s+".."+ha.get(s));
	}
//	遍历 keyset+迭代器
//	1.获取所有key所在的Set集合
	Set<Persons> se=ha.keySet();
	Iterator<Persons> it= se.iterator();
//  循环
	while (it.hasNext()) {
     Persons p=it.next();
     System.out.println(p+"..."+ha.get(p));
	}
 }
}

　　

package comdame;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;

public class Demo22 {
public static void main(String[] args) {
HashMap<String, String> ha=new HashMap<String, String>();
// 存值
ha.put("a", "ca");
ha.put("b", "ca");
// 遍历 keyset+迭代器
// 1.获取所有key所在的Set集合
Set<String> se= ha.keySet();
for(String s:se){
System.out.println(s+"..."+ha.get(s));
}
// 遍历keySet+增强for
// 1.获取所有key所在的Set集合
Set<String> set=ha.keySet();
// 创建 iterator对象
Iterator<String> it = set.iterator();
while (it.hasNext()) {
String ss=it.next();
System.out.println(ss+"..."+ha.get(ss));

}

}
}