Java 向hashMap添加两个对象?
是否已将元素正确添加到哈希表中Java 向hashMap添加两个对象?,java,Java,是否已将元素正确添加到哈希表中 Flows flows = new Flows(sIP,dIP); FlowStatics flowStatics = new FlowStatics(packetLength,timeArrival); HashMap myHashMap = new HashMap<Flows, FlowStatics>(); myHashMap.put(flows, flowStatics); 流量=新流量(sIP、dIP); FlowStatics Flow
Flows flows = new Flows(sIP,dIP);
FlowStatics flowStatics = new FlowStatics(packetLength,timeArrival);
HashMap myHashMap = new HashMap<Flows, FlowStatics>();
myHashMap.put(flows, flowStatics);
流量=新流量(sIP、dIP);
FlowStatics FlowStatics=新的FlowStatics(包裹长度、到达时间);
HashMap myHashMap=新HashMap();
put(流、流静态);
代码看起来正常
但是,您应该确保流
覆盖等于
并且哈希代码
代码看起来正常
但是,您应该确保
流
覆盖等于
和hashCode
我将更改HashMap myHashMap=newhashmap()代码>
toHashMap myHashMap=newhashmap()代码>但是addig是完全正常的。我将更改HashMap myHashMap=newhashmap()代码>
toHashMap myHashMap=newhashmap()代码>但addig完全正常。替换此行
HashMap myHashMap = new HashMap<Flows, FlowStatics>();
HashMap myHashMap=newhashmap();
用这个
Map<Flows, FlowStatics> myHashMap = new HashMap<Flows, FlowStatics>();
Map myHashMap=newhashmap();
更换该行
HashMap myHashMap = new HashMap<Flows, FlowStatics>();
HashMap myHashMap=newhashmap();
用这个
Map<Flows, FlowStatics> myHashMap = new HashMap<Flows, FlowStatics>();
Map myHashMap=newhashmap();
为避免编译器警告,请按以下方式编写代码:
HashMap<Flows, FlowStatics> myHashMap = new HashMap<Flows, FlowStatics>();
myHashMap.put(flows, flowStatics);
HashMap myHashMap=newhashmap();
put(流、流静态);
如果没有参数化myHashMap变量,则无法在第二行中添加而不得到警告
下面是关于如何“打印”一些hashmap统计信息的工作示例:
HashMap<Flows, FlowStatics> myHashMap = new HashMap<Flows, FlowStatics>();
for (int i = 0; i < 10; i++) {
// OP commented that the map is populated in a loop
myHashMap.put(createNewFlow(), createNewFlowStatistics()); // populate map
}
System.out.printf("Number of items in Map: %s%n", myHashMap.keyset().size());
HashMap myHashMap=newhashmap();
对于(int i=0;i<10;i++){
//OP评论说,映射填充在一个循环中
myHashMap.put(createNewFlow(),createNewFlowStatistics());//填充映射
}
System.out.printf(“映射中的项目数:%s%n”,myHashMap.keyset().size());
(OP在对另一个答案的评论中询问了advice)为避免编译器警告,请按以下方式编写代码:
HashMap<Flows, FlowStatics> myHashMap = new HashMap<Flows, FlowStatics>();
myHashMap.put(flows, flowStatics);
HashMap myHashMap=newhashmap();
put(流、流静态);
如果没有参数化myHashMap变量,则无法在第二行中添加而不得到警告
下面是关于如何“打印”一些hashmap统计信息的工作示例:
HashMap<Flows, FlowStatics> myHashMap = new HashMap<Flows, FlowStatics>();
for (int i = 0; i < 10; i++) {
// OP commented that the map is populated in a loop
myHashMap.put(createNewFlow(), createNewFlowStatistics()); // populate map
}
System.out.printf("Number of items in Map: %s%n", myHashMap.keyset().size());
HashMap myHashMap=newhashmap();
对于(int i=0;i<10;i++){
//OP评论说,映射填充在一个循环中
myHashMap.put(createNewFlow(),createNewFlowStatistics());//填充映射
}
System.out.printf(“映射中的项目数:%s%n”,myHashMap.keyset().size());
(OP在对另一个答案的评论中要求与之告别)@Shervin
对吗
package myclassifier;
public class Flows implements Comparable<Flows> {
String srcAddr, dstAddr, srcPort, dstPort, protocol;
public Flows(String sIP, String dIP){
this.srcAddr = sIP;
this.dstAddr = dIP;
}
public int compareTo(Flows other) {
int res = this.srcAddr.compareTo(other.srcAddr);
if (res != 0) {
return res;
}
res = this.dstAddr.compareTo(other.dstAddr);
if (res != 0) {
return res;
}
res = this.srcPort.compareTo(other.srcPort);
if (res != 0) {
return res;
}
res = this.dstPort.compareTo(other.dstPort);
if (res != 0) {
return res;
}
return this.protocol.compareTo(other.protocol);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((dstAddr == null) ? 0 : dstAddr.hashCode());
result = prime * result + ((dstPort == null) ? 0 : dstPort.hashCode());
result = prime * result + ((srcAddr == null) ? 0 : srcAddr.hashCode());
result = prime * result + ((srcPort == null) ? 0 : srcPort.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Flows other = (Flows) obj;
if (dstAddr == null) {
if (other.dstAddr != null)
return false;
} else if (!dstAddr.equals(other.dstAddr))
return false;
if (dstPort == null) {
if (other.dstPort != null)
return false;
} else if (!dstPort.equals(other.dstPort))
return false;
if (srcAddr == null) {
if (other.srcAddr != null)
return false;
} else if (!srcAddr.equals(other.srcAddr))
return false;
if (srcPort == null) {
if (other.srcPort != null)
return false;
} else if (!srcPort.equals(other.srcPort))
return false;
return true;
}
}
package-myclassifier;
公共类流实现了可比性{
字符串srcAddr,dstAddr,srcPort,dstPort,protocol;
公共流(串sIP、串dIP){
this.srcadr=sIP;
此.dstAddr=倾角;
}
公共int比较(其他流量){
int res=this.srcadr.compareTo(other.srcadr);
如果(res!=0){
返回res;
}
res=此.dstAddr.compareTo(其他.dstAddr);
如果(res!=0){
返回res;
}
res=this.srcPort.compareTo(other.srcPort);
如果(res!=0){
返回res;
}
res=此.dstPort.compareTo(其他.dstPort);
如果(res!=0){
返回res;
}
返回此.protocol.compareTo(其他.protocol);
}
@凌驾
公共int hashCode(){
最终整数素数=31;
int结果=1;
result=prime*result+((dstAddr==null)?0:dstAddr.hashCode();
result=prime*result+((dsport==null)?0:dsport.hashCode();
result=prime*result+((srcadr==null)?0:srcadr.hashCode();
result=prime*result+((srcPort==null)?0:srcPort.hashCode();
返回结果;
}
@凌驾
公共布尔等于(对象obj){
if(this==obj)
返回true;
if(obj==null)
返回false;
如果(getClass()!=obj.getClass())
返回false;
其他流量=(流量)obj;
if(dstAddr==null){
if(other.dstAddr!=null)
返回false;
}如果(!dstAddr.equals(other.dstAddr))
返回false;
if(dstPort==null){
if(other.dstPort!=null)
返回false;
}如果(!dstPort.equals(other.dstPort))
返回false;
if(srcadr==null){
if(other.srcadr!=null)
返回false;
}else如果(!srcadr.equals(other.srcadr))
返回false;
如果(srcPort==null){
if(other.srcPort!=null)
返回false;
}如果(!srcPort.equals(other.srcPort))
返回false;
返回true;
}
}
@Shervin
对吗
package myclassifier;
public class Flows implements Comparable<Flows> {
String srcAddr, dstAddr, srcPort, dstPort, protocol;
public Flows(String sIP, String dIP){
this.srcAddr = sIP;
this.dstAddr = dIP;
}
public int compareTo(Flows other) {
int res = this.srcAddr.compareTo(other.srcAddr);
if (res != 0) {
return res;
}
res = this.dstAddr.compareTo(other.dstAddr);
if (res != 0) {
return res;
}
res = this.srcPort.compareTo(other.srcPort);
if (res != 0) {
return res;
}
res = this.dstPort.compareTo(other.dstPort);
if (res != 0) {
return res;
}
return this.protocol.compareTo(other.protocol);
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((dstAddr == null) ? 0 : dstAddr.hashCode());
result = prime * result + ((dstPort == null) ? 0 : dstPort.hashCode());
result = prime * result + ((srcAddr == null) ? 0 : srcAddr.hashCode());
result = prime * result + ((srcPort == null) ? 0 : srcPort.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Flows other = (Flows) obj;
if (dstAddr == null) {
if (other.dstAddr != null)
return false;
} else if (!dstAddr.equals(other.dstAddr))
return false;
if (dstPort == null) {
if (other.dstPort != null)
return false;
} else if (!dstPort.equals(other.dstPort))
return false;
if (srcAddr == null) {
if (other.srcAddr != null)
return false;
} else if (!srcAddr.equals(other.srcAddr))
return false;
if (srcPort == null) {
if (other.srcPort != null)
return false;
} else if (!srcPort.equals(other.srcPort))
return false;
return true;
}
}
package-myclassifier;
公共类流实现了可比性{
字符串srcAddr,dstAddr,srcPort,dstPort,protocol;
公共流(串sIP、串dIP){
this.srcadr=sIP;
此.dstAddr=倾角;
}
公共int比较(其他流量){
int res=this.srcadr.compareTo(other.srcadr);
如果(res!=0){
返回res;
}
res=此.dstAddr.compareTo(其他.dstAddr);
如果(res!=0){
返回res;
}
res=this.srcPort.compareTo(other.srcPort);
如果(res!=0){
返回res;
}
res=此.dstPort.compareTo(其他.dstPort);
如果(res!=0){
返回res;
}
返回此.protocol.compareTo(其他.protocol);
}
@凌驾
公共int hashCode(){
最终整数素数=31;
int结果=1;
result=prime*result+((dstAddr==null)?0:dstAddr.hashCode();
result=prime*result+((dsport==null)?0:dsport.hashCode();
R