我从未擅长使用java图形界面。我正在创建一个程序，它将创建一个“联系人”数组并将它们显示到一个框架。我可以正确添加，删除和排序数组。我只是无法让它显示在屏幕上。我遇到了不正确显示的几种变体。无论我做什么，我似乎无法让“联系”显示正确。我的意思是，当运行这个程序时，应该出现一个jframe，其中包含4个带图片和文本信息的联系人。然后用户可以删除其中一个联系人，程序应显示一个新的按字母顺序排序的列表，而不删除已删除的联系人。
我遇到的问题是让我的联系人在jframe中显示。当我运行该程序时，联系人会出现，但只有在主方法中，我每次添加新联系人时都会调用我的show函数。否则jframe只显示添加的最后一个联系人，直到程序被告知要删除哪个联系人。然后jframe显示太多的联系人。
请帮我弄清楚我做错了什么。我为我糟糕的格式道歉。这是我第一次使用这个网站。
/*
blake yacavone
advanced programming
project 1
*/
import java.util.Scanner;
public class project1Tester
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
contactArrayList list = new contactArrayList();
contact beatle1 = new contact("Paul", 1284, "Beverly Hills", "California", 90209, "paul.jpg", "vocals");
list.addContact(beatle1);
list.showContacts();
contact beatle2 = new contact("Pete", 1284, "Beverly Hills", "California", 90209, "pete.jpg", "drummer");
list.addContact(beatle2);
list.showContacts();
contact beatle3 = new contact("John", 1284, "Beverly Hills", "California", 90209, "john.jpg", "vocals");
list.addContact(beatle3);
list.showContacts();
contact beatle4 = new contact("George", 1284, "Beverly Hills", "California", 90209, "george.jpg", "vocals");
list.addContact(beatle4);
list.showContacts();
System.out.println("please enter the identification number of the contact you would like deleted ");
list.delete(input.nextInt());
list.showContacts();
contact beatle5 = new contact("Ringo", 1284, "Beverly Hills", "California", 90209, "ringo.jpg", "drummer");
list.addContact(beatle5);
list.showContacts();
list.sort();
list.showContacts();
}
}
/*
blake yacavone
advanced programming
project 1
*/
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.*;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JComponent;
import java.awt.Toolkit;
import java.awt.Image;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JPanel;
import javax.swing.ImageIcon;
public class contactArrayList extends JFrame
{
public contact[] contactList; //declares an array of contacts
JFrame contactViewer; //creates a frame to hold my panel
JPanel contactGrid; //creates a panel to hold my contact information
int contactCount = 1; //keeps track of / assigns ID numbers to each contact that is created
contactArrayList() //constructor for a contact array list
{
this.contactList = new contact[0]; //creates an array of contacts of inital size 0
this.contactViewer = new contactListFrame();
contactViewer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.contactGrid = new JPanel();
contactGrid.setBackground(Color.WHITE);
contactViewer.add(contactGrid);
contactViewer.setVisible(true);
}
int checkList(String name) //walks through the array checking for a contact of a specified name
{
if(contactList.length == 1) //if the length of the contact list is one than its empty and an element should be added
{
return 1;
}
for(int i = 0; i < contactList.length; i++)
{
if(name.equals(contactList[i].getName()))
{
return 0;
}
}
return 1;
}
void addContact(contact person)
{ //calls check and if check returns true it adds the contact to the contactList
if ( (checkList(person.getName())) > 0 )
{
resize(1); //calls resize method to increase the size of the array
person.setID(contactCount++); //gives the contact their id number
contactList[contactList.length-1] = person; //adds the contact to the end of the array
}
else
{
System.out.println("ERROR, the requested contact is already in the list");
}
}
void delete(int ID) //deletes a contact specified by name
{
for(int i = 0; i < contactList.length-1; i++) //runs through the array searching for the specified name
{
if(ID == contactList[i].getID()) //if the ID i was given matches the one im looking at in the
{ //contact list AND i+1 does not equal the end of the array,
contact temp = contactList[i]; //swap the entry marked for deletion with the next entry
contactList[i] = contactList[i+1]; //in the array until entry marked for deletion is at the end
contactList[i+1] = temp;
}
}
resize(-1);
}
void resize(int direction)
{
if(direction > 0) //if direction is a positive number increase the array size
{
contact[] tempList = new contact[contactList.length + 1]; //creates a temporary contact list array
for(int i = 0; i < contactList.length; i++) //runs through the contact list array and copies its data into the temp list
{
tempList[i] = contactList[i];
}
contactList = new contact[contactList.length + 1]; //re initalizes contact list with a new size
for(int i = 0; i < contactList.length; i++) //runs through the temp array and copies its data into the new bigger contact list
{
contactList[i] = tempList[i];
}
}
else if(direction < 0) //if direction is a negative number decrease the array size
{
contact[] tempList = new contact[contactList.length]; //creates a temporary contact list array
for(int i = 0; i < contactList.length; i++) //runs through the contact list array and copies its data into the temp list
{
tempList[i] = contactList[i];
}
contactList = new contact[contactList.length - 1]; //re initalizes contact list with a new size
for(int i = 0; i < contactList.length; i++) //runs through the contact list array and copies its data into the temp list
{
contactList[i] = tempList[i];
}
}
}
void sort()
{
for(int i = 0; i < contactList.length-1; i++)
{
for(int j = 1; j < contactList.length; j++)
{
if( (contactList[i].getName().charAt(0)) < (contactList[j].getName().charAt(0)) );
{
contact temp = contactList[i];
contactList[i] = contactList[j];
contactList[j] = temp;
}
}
}
}
void showContacts()
{
JLabel contactInfo = new JLabel();
for(int i = 0; i < contactList.length; i ++)
{
contactInfo.setText( getText(contactList[i]) );
ImageIcon photo = new ImageIcon(getPicture(contactList[i]));
contactInfo.setIcon(photo);
contactGrid.add(contactInfo);
contactGrid.setVisible(true);
}
contactViewer.add(contactGrid);
//contactViewer.pack();
contactViewer.setVisible(true);
}
String getPicture(contact person)
{
return (person.getPicture());
}
int getID(contact person)
{
return (person.getID());
}
String getName(contact person)
{
return (person.getName());
}
int getAddress(contact person)
{
return (person.getAddress());
}
String getCity(contact person)
{
return (person.getCity());
}
String getState(contact person)
{
return (person.getState());
}
int getZipCode(contact person)
{
return (person.getZipCode());
}
String getComment(contact person)
{
return (person.getComment());
}
String getText(contact person)
{
String text = Integer.toString(getID(person)) + " \n " + getName(person) + " \n " + Integer.toString(getAddress(person)) + " \n " + getCity(person) + " \n " + getState(person) + " \n " + Integer.toString(getZipCode(person)) + " \n " + getComment(person);
return(text);
}
}
/*
Blake yacavone
*/
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class contactListFrame extends JFrame
{
private static final int FRAME_WIDTH = 400;
private static final int FRAME_HEIGHT = 500;
private static final int FRAME_OFFSET = 15;
public contactListFrame()
{
setSize(FRAME_WIDTH, FRAME_HEIGHT);
}
}
/*
blake yacavone
advanced programming
project 1
*/
public class contact
{
private int ID = 0;
private String name;
private int address;
private String city;
private String state;
private int zipCode;
private String picture;//picture is a string with the file name of the picture to be displayed with the Contact.
private String comment;
public contact(String name, int address, String city, String state, int zipCode, String picture,String comment)
{
this.name = name;
this.address = address;
this.city = city;
this.state = state;
this.zipCode = zipCode;
this.picture = picture;
this.comment = comment;
}
public contact()
{
this.name = "problem name";
this.address = 1134;
this.city = "problem city";
this.state = "problem state";
this.zipCode = 1134;
this.picture = "problem picture";
this.comment = "problem comment";
}
public void setID(int ID)
{
this.ID = ID;
}
public String getName()
{
return this.name;
}
public int getAddress()
{
return this.address;
}
public String getCity()
{
return this.city;
}
public String getState()
{
return this.state;
}
public int getZipCode()
{
return this.zipCode;
}
public String getPicture()
{
return this.picture;
}
public String getComment()
{
return this.comment;
}
public int getID()
{
return this.ID;
}
}
答案 0 :(得分：0)
仅在屏幕上显示？
我已将所有类放在runnable类（具有main方法）上，并将转换后的类转换为静态类以访问该静态方法
import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.*;
import java.awt.Graphics;
import java.awt.Graphics2D;
import javax.swing.JComponent;
import java.awt.Toolkit;
import java.awt.Image;
import java.awt.BorderLayout;
import java.awt.GridLayout;
import javax.swing.JPanel;
import javax.swing.ImageIcon;
import java.util.Scanner;
import java.awt.GridLayout;
import java.awt.BorderLayout;
import java.awt.Color;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class project1Tester
{
public static class contactListFrame extends JFrame
{
private static final int FRAME_WIDTH = 400;
private static final int FRAME_HEIGHT = 500;
private static final int FRAME_OFFSET = 15;
public contactListFrame()
{
setSize(FRAME_WIDTH, FRAME_HEIGHT);
}
}
public static class contact
{
private int ID = 0;
private String name;
private int address;
private String city;
private String state;
private int zipCode;
private String picture;//picture is a string with the file name of the picture to be displayed with the Contact.
private String comment;
public contact(String name, int address, String city, String state, int zipCode, String picture,String comment)
{
this.name = name;
this.address = address;
this.city = city;
this.state = state;
this.zipCode = zipCode;
this.picture = picture;
this.comment = comment;
}
public contact()
{
this.name = "problem name";
this.address = 1134;
this.city = "problem city";
this.state = "problem state";
this.zipCode = 1134;
this.picture = "problem picture";
this.comment = "problem comment";
}
public void setID(int ID)
{
this.ID = ID;
}
public String getName()
{
return this.name;
}
public int getAddress()
{
return this.address;
}
public String getCity()
{
return this.city;
}
public String getState()
{
return this.state;
}
public int getZipCode()
{
return this.zipCode;
}
public String getPicture()
{
return this.picture;
}
public String getComment()
{
return this.comment;
}
public int getID()
{
return this.ID;
}
}
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
contactArrayList list = new contactArrayList();
contact beatle1 = new contact("Paul", 1284, "Beverly Hills", "California", 90209, "paul.jpg", "vocals");
list.addContact(beatle1);
list.showContacts();
contact beatle2 = new contact("Pete", 1284, "Beverly Hills", "California", 90209, "pete.jpg", "drummer");
list.addContact(beatle2);
list.showContacts();
contact beatle3 = new contact("John", 1284, "Beverly Hills", "California", 90209, "john.jpg", "vocals");
list.addContact(beatle3);
list.showContacts();
contact beatle4 = new contact("George", 1284, "Beverly Hills", "California", 90209, "george.jpg", "vocals");
list.addContact(beatle4);
list.showContacts();
System.out.println("please enter the identification number of the contact you would like deleted ");
list.delete(input.nextInt());
list.showContacts();
contact beatle5 = new contact("Ringo", 1284, "Beverly Hills", "California", 90209, "ringo.jpg", "drummer");
list.addContact(beatle5);
list.showContacts();
list.sort();
list.showContacts();
}
public static class contactArrayList extends JFrame
{
public contact[] contactList; //declares an array of contacts
JFrame contactViewer; //creates a frame to hold my panel
JPanel contactGrid; //creates a panel to hold my contact information
int contactCount = 1; //keeps track of / assigns ID numbers to each contact that is created
contactArrayList() //constructor for a contact array list
{
this.contactList = new contact[0]; //creates an array of contacts of inital size 0
this.contactViewer = new contactListFrame();
contactViewer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
this.contactGrid = new JPanel();
contactGrid.setBackground(Color.WHITE);
contactViewer.add(contactGrid);
contactViewer.setVisible(true);
}
int checkList(String name) //walks through the array checking for a contact of a specified name
{
if(contactList.length == 1) //if the length of the contact list is one than its empty and an element should be added
{
return 1;
}
for(int i = 0; i < contactList.length; i++)
{
if(name.equals(contactList[i].getName()))
{
return 0;
}
}
return 1;
}
void addContact(contact person)
{ //calls check and if check returns true it adds the contact to the contactList
if ( (checkList(person.getName())) > 0 )
{
resize(1); //calls resize method to increase the size of the array
person.setID(contactCount++); //gives the contact their id number
contactList[contactList.length-1] = person; //adds the contact to the end of the array
}
else
{
System.out.println("ERROR, the requested contact is already in the list");
}
}
void delete(int ID) //deletes a contact specified by name
{
for(int i = 0; i < contactList.length-1; i++) //runs through the array searching for the specified name
{
if(ID == contactList[i].getID()) //if the ID i was given matches the one im looking at in the
{ //contact list AND i+1 does not equal the end of the array,
contact temp = contactList[i]; //swap the entry marked for deletion with the next entry
contactList[i] = contactList[i+1]; //in the array until entry marked for deletion is at the end
contactList[i+1] = temp;
}
}
resize(-1);
}
void resize(int direction)
{
if(direction > 0) //if direction is a positive number increase the array size
{
contact[] tempList = new contact[contactList.length + 1]; //creates a temporary contact list array
for(int i = 0; i < contactList.length; i++) //runs through the contact list array and copies its data into the temp list
{
tempList[i] = contactList[i];
}
contactList = new contact[contactList.length + 1]; //re initalizes contact list with a new size
for(int i = 0; i < contactList.length; i++) //runs through the temp array and copies its data into the new bigger contact list
{
contactList[i] = tempList[i];
}
}
else if(direction < 0) //if direction is a negative number decrease the array size
{
contact[] tempList = new contact[contactList.length]; //creates a temporary contact list array
for(int i = 0; i < contactList.length; i++) //runs through the contact list array and copies its data into the temp list
{
tempList[i] = contactList[i];
}
contactList = new contact[contactList.length - 1]; //re initalizes contact list with a new size
for(int i = 0; i < contactList.length; i++) //runs through the contact list array and copies its data into the temp list
{
contactList[i] = tempList[i];
}
}
}
void sort()
{
for(int i = 0; i < contactList.length-1; i++)
{
for(int j = 1; j < contactList.length; j++)
{
if( (contactList[i].getName().charAt(0)) < (contactList[j].getName().charAt(0)) );
{
contact temp = contactList[i];
contactList[i] = contactList[j];
contactList[j] = temp;
}
}
}
}
void showContacts()
{
JLabel contactInfo = new JLabel();
for(int i = 0; i < contactList.length; i ++)
{
contactInfo.setText( getText(contactList[i]) );
ImageIcon photo = new ImageIcon(getPicture(contactList[i]));
contactInfo.setIcon(photo);
contactGrid.add(contactInfo);
contactGrid.setVisible(true);
}
contactViewer.add(contactGrid);
//contactViewer.pack();
contactViewer.setVisible(true);
}
String getPicture(contact person)
{
return (person.getPicture());
}
int getID(contact person)
{
return (person.getID());
}
String getName(contact person)
{
return (person.getName());
}
int getAddress(contact person)
{
return (person.getAddress());
}
String getCity(contact person)
{
return (person.getCity());
}
String getState(contact person)
{
return (person.getState());
}
int getZipCode(contact person)
{
return (person.getZipCode());
}
String getComment(contact person)
{
return (person.getComment());
}
String getText(contact person)
{
String text = Integer.toString(getID(person)) + " \n " + getName(person) + " \n " + Integer.toString(getAddress(person)) + " \n " + getCity(person) + " \n " + getState(person) + " \n " + Integer.toString(getZipCode(person)) + " \n " + getComment(person);
return(text);
}
}
}