问题描述
所以这是我的代码，我正在编写一个程序，将文本分类为对象实例，当用户开始在JTextArea中键入内容时，这些对象实例会自动创建。 在此处的StudentList类中，我具有String名，lastname，dateofbirth和year。 当用户开始键入StudentList实例时，将创建一个存储在用户之前的第一个文本作为名字，存储该空间在姓氏之后的文本，用户按Enter键，然后Enter的文本格式为出生日期（mm / dd / yyyy），然后用户再次按Enter键，输入后的文本将变为Year（格式为“ Year num，即Year 10，Year 12 ...”。例如：Joseph \\ sNancy \\ n03 / 04/1999 \\ nYear 11名字成为：约瑟夫（Joseph），姓：南希（Nancy）。dateofbirth：03/04/1999年：第11年，创建了StudentList类型的第一个Object实例。
之后，在创建第一个对象并存储year（最后一个实例变量）之后，我将喜欢StudentList的另一个实例，如果在Year之后输入文本，则该过程会重复进行自身操作。帮助将所有新创建的StudentList添加到数组列表
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.*;
import java.util.*;
public class InfoAdd implements KeyListener {
private JTextArea textar;
private JTextArea textarea;
private JPanel panel;
ArrayList <StudentList> stdlist;
public static void main (String [] args) {
InfoAdd inadd = new InfoAdd();
inadd.go();
}
public void go() {
JFrame frame = new JFrame("InfoAdd");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
panel = new JPanel();
JPanel btpanel = new JPanel();
JButton button = new JButton("Click");
textarea = new JTextArea(10, 15);
textar = new JTextArea(10, 15);
JScrollPane scrollpane = new JScrollPane(textarea);
JScrollPane scrollpan = new JScrollPane(textar);
textarea.addKeyListener(this);
textarea.setLineWrap(true);
textar.setLineWrap(true);
scrollpane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollpane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollpan.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollpan.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.add(scrollpane);
panel.add(scrollpan);
btpanel.add(button);
frame.setSize(300, 300);
frame.add(BorderLayout.WEST, panel);
frame.add(BorderLayout.EAST, btpanel);
frame.setVisible(true);
}
public void keyTyped(KeyEvent e) {
String add = textarea.getText();
String [] delimiter = add.split("\\s+");
String [] enter = add.split("[\\r\\n]+");
stdlist = new ArrayList<StudentList>();
for(int i=0;i<add.length();i++) {
StudentList sdt = new StudentList();
if(delimiter.length==2) {
sdt.SetFirstName(delimiter[i]);
}
stdlist.add(sdt);
textar.setEditable(false);
textar.setText("Firstname: "+sdt.getFirstName()+"\nLastName: "+sdt.getLastName()+"\nYear: ");
}
}
public void keyPressed(KeyEvent e) {
}
public void keyReleased(KeyEvent e) {
}
class StudentList {
private String firstname;
private String lastname;
private String year;
private String dateofbirth;
public void SetFirstName(String y) {
y = firstname;
}
public void setLastName(String c) {
c = lastname;
}
public void setYear(String t) {
t = year;
}
public void setDateofBirth(String u) {
u = dateofbirth;
}
public String getFirstName() {
return firstname;
}
public String getLastName() {
return lastname;
}
public String getYear() {
return year;
}
public String getDateofBirth(){
return dateofbirth;
}
}
}
1楼
正如djbrown提到的那样，您的setter创建是错误的，并且我在InfoAdd类中更改了一些代码行。（如果您使用的是这些IDE之一，则为netbeans，intellij想法，eclipse。此IDE提供了生成getter和setter的功能。麻烦了）
import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.event.*;
import java.util.*;
public class InfoAdd implements KeyListener {
private JTextArea textar;
private JTextArea textarea;
private JPanel panel;
ArrayList<StudentList> stdlist;
public static void main(String[] args) {
InfoAdd inadd = new InfoAdd();
inadd.go();
}
public void go() {
JFrame frame = new JFrame("InfoAdd");
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
panel = new JPanel();
JPanel btpanel = new JPanel();
JButton button = new JButton("Click");
textarea = new JTextArea(10, 15);
textar = new JTextArea(10, 15);
JScrollPane scrollpane = new JScrollPane(textarea);
JScrollPane scrollpan = new JScrollPane(textar);
textarea.addKeyListener(this);
textarea.setLineWrap(true);
textar.setLineWrap(true);
scrollpane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollpane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollpan.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
scrollpan.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));
panel.add(scrollpane);
panel.add(scrollpan);
btpanel.add(button);
frame.setSize(300, 300);
frame.add(BorderLayout.WEST, panel);
frame.add(BorderLayout.EAST, btpanel);
frame.setVisible(true);
}
public void keyTyped(KeyEvent e) { }
public void keyPressed(KeyEvent e) { }
public void keyReleased(KeyEvent e) {
String add = textarea.getText();
String[] delimiter = add.split("\\s+");
String[] enter = add.split("[\\r\\n]+");
stdlist = new ArrayList<>();
for (int i = 0; i <= add.length(); i++) {
StudentList studentList = new StudentList();
System.out.println(delimiter.length);
switch (enter.length) {
case 1:
setName(delimiter, studentList);
break;
case 2:
setName(delimiter, studentList);
studentList.setDateofbirth(enter[1]);
break;
default:
setName(delimiter, studentList);
studentList.setDateofbirth(enter[1]);
studentList.setYear(enter[2]);
break;
}
stdlist.add(studentList);
textar.setEditable(false);
textar.setText("Firstname: " + studentList.getFirstname() + "\nLastName: " + studentList.getLastname()+" \nDateOfBirth: "+studentList.getDateofbirth() + "\nYear: " + studentList.getYear());
}
}
private void setName(String[] delimiter, StudentList studentList) {
if (delimiter.length == 1) {
studentList.setFirstname(delimiter[0]);
} else if (delimiter.length == 2) {
studentList.setFirstname(delimiter[0]);
studentList.setLastname(delimiter[1]);
}
}
class StudentList {
private String firstname;
private String lastname;
private String year;
private String dateofbirth;
public String getFirstname() {
return firstname;
}
public void setFirstname(String firstname) {
this.firstname = firstname;
}
public String getLastname() {
return lastname;
}
public void setLastname(String lastname) {
this.lastname = lastname;
}
public String getYear() {
return year;
}
public void setYear(String year) {
this.year = year;
}
public String getDateofbirth() {
return dateofbirth;
}
public void setDateofbirth(String dateofbirth) {
this.dateofbirth = dateofbirth;
}
}
}