执行时候缺少主方法和申明抽象

Question

执行时候缺少主方法和申明抽象
怎么解决啊
 缺少方法主体，或声明抽象
        public static void main(String[] args);
                           ^
1 错误

Answer 1

public static void main(String[] args);缺少程序的入口点，你再加一个类，添加
public static void main(String[] args)
{
去调用你的类执行就好了~
}

Answer 2

最好能把你的代码贴出来！如果这样的话，就不能回答了！如果你写的是main方法的话，就要去掉后面的分号。像你上面写的是方法的声明，在抽象类和接口中使用！

Answer 3

public class AuctionItem {
class Ass{
public static void main(String[] args)
{
 private int itemID;
 private String itemDescription;
 private String sellerID;
 private double startingPrice;
 private String auctionStatus; 
 private double bid; 
 private String bidder;  public AuctionItem() {
 } public AuctionItem(int itemID, String itemDescription, String sellerID,
   double startingPrice) {
  this.itemID = itemID;
  this.itemDescription = itemDescription;
  this.sellerID = sellerID;
  this.startingPrice = startingPrice;
 }
 boolean hasBids() {
  if (this.getBid() != 0) {
   return true;
  }
  return false;
 } 
 public double open(){
  if("Closed".equalsIgnoreCase(this.getAuctionStatus()) || "Pending".equalsIgnoreCase(this.getAuctionStatus())){
   this.setAuctionStatus("Open");
  }
  return this.getBid();
 }
 
 
 public double close(){
  if("Open".equalsIgnoreCase(this.getAuctionStatus())){
   this.setAuctionStatus("Closed");
  }
  return this.getBid();
 } public int placeBid(double bidAmount, String bidder){
  if ("Open".equalsIgnoreCase(this.getAuctionStatus()) && (bidAmount >= this.getBid() || bidAmount >= this.getStartingPrice())) {
   this.setBid(bidAmount);
   this.setBidder(bidder);
   return 0;
  } else {
   return -2;
  }
 } public void print(){
  System.out.println("itemID:"+this.getItemID()+";");
  System.out.println("itemDescription:"+this.getItemDescription()+";");
  System.out.println("sellerID:"+this.getSellerID()+";");
  System.out.println("startingPrice:"+this.getStartingPrice()+";");
  System.out.println("auctionStatus:"+this.getAuctionStatus()+";");
  System.out.println("bid:"+this.getBid()+";");
  System.out.println("bidder:"+this.getBidder()+";");
 }
 
 public int getItemID() {
  return itemID;
 } public void setItemID(int itemID) {
  this.itemID = itemID;
 } public String getItemDescription() {
  return itemDescription;
 } public void setItemDescription(String itemDescription) {
  this.itemDescription = itemDescription;
 } public String getSellerID() {
  return sellerID;
 } public void setSellerID(String sellerID) {
  this.sellerID = sellerID;
 } public double getStartingPrice() {
  return startingPrice;
 } public void setStartingPrice(double startingPrice) {
  this.startingPrice = startingPrice;
 } public String getAuctionStatus() {
  return auctionStatus;
 } public void setAuctionStatus(String auctionStatus) {
  this.auctionStatus = auctionStatus;
 } public double getBid() {
  return bid;
 } public void setBid(double bid) {
  this.bid = bid;
 } public String getBidder() {
  return bidder;
 } public void setBidder(String bidder) {
  this.bidder = bidder;
 }
} 
}求解答

Answer 4

main方法怎么在成员内部类呢
当然无法执行了

Answer 5

package com.xiaoyong;public class AuctionItem {
private int itemID;
private String itemDescription;
private String sellerID;
private double startingPrice;
private String auctionStatus;
private double bid;
private String bidder; public AuctionItem() {
} public AuctionItem(int itemID, String itemDescription, String sellerID,
double startingPrice) {
this.itemID = itemID;
this.itemDescription = itemDescription;
this.sellerID = sellerID;
this.startingPrice = startingPrice;
} boolean hasBids() {
if (this.getBid() != 0) {
return true;
}
return false;
} public double open() {
if ("Closed".equalsIgnoreCase(this.getAuctionStatus())
|| "Pending".equalsIgnoreCase(this.getAuctionStatus())) {
this.setAuctionStatus("Open");
}
return this.getBid();
} public double close() {
if ("Open".equalsIgnoreCase(this.getAuctionStatus())) {
this.setAuctionStatus("Closed");
}
return this.getBid();
} public int placeBid(double bidAmount, String bidder) {
if ("Open".equalsIgnoreCase(this.getAuctionStatus())
&& (bidAmount >= this.getBid() || bidAmount >= this
.getStartingPrice())) {
this.setBid(bidAmount);
this.setBidder(bidder);
return 0;
} else {
return -2;
}
} public void print() {
System.out.println("itemID:" + this.getItemID() + ";");
System.out
.println("itemDescription:" + this.getItemDescription() + ";");
System.out.println("sellerID:" + this.getSellerID() + ";");
System.out.println("startingPrice:" + this.getStartingPrice() + ";");
System.out.println("auctionStatus:" + this.getAuctionStatus() + ";");
System.out.println("bid:" + this.getBid() + ";");
System.out.println("bidder:" + this.getBidder() + ";");
} public int getItemID() {
return itemID;
} public void setItemID(int itemID) {
this.itemID = itemID;
} public String getItemDescription() {
return itemDescription;
} public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
} public String getSellerID() {
return sellerID;
} public void setSellerID(String sellerID) {
this.sellerID = sellerID;
} public double getStartingPrice() {
return startingPrice;
} public void setStartingPrice(double startingPrice) {
this.startingPrice = startingPrice;
} public String getAuctionStatus() {
return auctionStatus;
} public void setAuctionStatus(String auctionStatus) {
this.auctionStatus = auctionStatus;
} public double getBid() {
return bid;
} public void setBid(double bid) {
this.bid = bid;
} public String getBidder() {
return bidder;
} public void setBidder(String bidder) {
this.bidder = bidder;
}

public static void main(String[] args) {
new AuctionItem().print();
}
}

Answer 6

先按你要求把你代码的错误处理下package com.keeya.csdn.test;public class AuctionItem {
static class Ass {
public static void main(String[] args) {
System.out.println("asdfasf");
}
} private int itemID; private String itemDescription; private String sellerID; private double startingPrice; private String auctionStatus; private double bid; private String bidder; public AuctionItem() {
} public AuctionItem(int itemID, String itemDescription, String sellerID,
double startingPrice) {
this.itemID = itemID;
this.itemDescription = itemDescription;
this.sellerID = sellerID;
this.startingPrice = startingPrice;
} boolean hasBids() {
if (this.getBid() != 0) {
return true;
}
return false;
} public double open() {
if ("Closed".equalsIgnoreCase(this.getAuctionStatus())
|| "Pending".equalsIgnoreCase(this.getAuctionStatus())) {
this.setAuctionStatus("Open");
}
return this.getBid();
} public double close() {
if ("Open".equalsIgnoreCase(this.getAuctionStatus())) {
this.setAuctionStatus("Closed");
}
return this.getBid();
} public int placeBid(double bidAmount, String bidder) {
if ("Open".equalsIgnoreCase(this.getAuctionStatus())
&& (bidAmount >= this.getBid() || bidAmount >= this
.getStartingPrice())) {
this.setBid(bidAmount);
this.setBidder(bidder);
return 0;
} else {
return -2;
}
} public void print() {
System.out.println("itemID:" + this.getItemID() + ";");
System.out
.println("itemDescription:" + this.getItemDescription() + ";");
System.out.println("sellerID:" + this.getSellerID() + ";");
System.out.println("startingPrice:" + this.getStartingPrice() + ";");
System.out.println("auctionStatus:" + this.getAuctionStatus() + ";");
System.out.println("bid:" + this.getBid() + ";");
System.out.println("bidder:" + this.getBidder() + ";");
} public int getItemID() {
return itemID;
} public void setItemID(int itemID) {
this.itemID = itemID;
} public String getItemDescription() {
return itemDescription;
} public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
} public String getSellerID() {
return sellerID;
} public void setSellerID(String sellerID) {
this.sellerID = sellerID;
} public double getStartingPrice() {
return startingPrice;
} public void setStartingPrice(double startingPrice) {
this.startingPrice = startingPrice;
} public String getAuctionStatus() {
return auctionStatus;
} public void setAuctionStatus(String auctionStatus) {
this.auctionStatus = auctionStatus;
} public double getBid() {
return bid;
} public void setBid(double bid) {
this.bid = bid;
} public String getBidder() {
return bidder;
} public void setBidder(String bidder) {
this.bidder = bidder;
}
}只是让代码不报错，但是你的代码把入口函数写在一个内部类中 执行的时候怎么能找到呢
不知道你这么写有什么目的