我正在开展的这个新项目，我们应该建立一个GUI应用程序，作为囚犯的警长预订系统。我觉得我在正确的轨道上，但我开始遇到一些障碍。
我在使用datePickers时遇到了一些麻烦，并将日期传递给了一个＆＃34; Inmate＆＃34;（类）实例化。没有编译错误，但是当我尝试从用户输入添加囚犯时发生了一些错误。它不会让我在没有抛出nullpointerexception的情况下首先选择arrestDate，但如果我从发布日期开始，那么我不会遇到同样的问题，我不知道为什么。我使用tableView显示所有值，因为它是我找到的最简单的排序方式。我认为错误来自于尝试将LocalDate转换为Date然后将其传递给实例化。我试图避免使用数据库，因为我还没有接受过关于如何使用java的培训。
还有一个奇怪的错误，我的一个专栏没有显示它应该是的数据，我似乎无法找到我做错的事情。它与inmateIDCol。它不会显示我预设的任何ID。
我也不明白为什么不能自己编辑细胞。
我仍计划对tableview和访问者日志实施过滤器。但我似乎无法在不添加新窗口的情况下围绕如何使用访问者日志tableview更改tableview。只是让一个消失，下一个弹出也是完美的。我想添加一个按钮，说明查看访问者的日志，然后添加＆＃34;添加＆＃34;和＃34;完成＆＃34;按钮到访客日志。完成按钮将返回原始囚犯日志。
这是我目前无法解决的主要问题。如果你有任何提示，想法，简单的修复，我可以看到的任何可能有助于它将非常感谢！
public class Final extends Application {
String s;
Format formatter = new SimpleDateFormat("dd-MMM-yy");
Date arrestDate;
Date courtDate;
Date releaseDate;
int IDNum;
//build inmates
ObservableList<Inmate> inmateList;
@Override
public void start(Stage primaryStage) {
//build inmates
buildInmates();
//create pane
TableView tableView = new TableView();//ObservableList<Inmate> inmateList);
//tableView.setItems(inmateList);
tableView.setEditable(true);
//Title
Label label = new Label("Sheriff Booking System");
label.setFont(new Font("Arial", 40));
//set columns
TableColumn firstNameCol = new TableColumn("First Name");
firstNameCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("fName")
);
firstNameCol.setEditable(true);
firstNameCol.setMinWidth(150);
TableColumn lastNameCol = new TableColumn("Last Name");
lastNameCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("lName")
);
lastNameCol.setEditable(true);
lastNameCol.setMinWidth(175);
TableColumn inmateIDCol = new TableColumn("Inmate ID");
inmateIDCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("IDNumber")
);
inmateIDCol.setEditable(true);
inmateIDCol.setMinWidth(100);
TableColumn cellBlockCol = new TableColumn("Cell Block");
cellBlockCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("cellBlock")
);
cellBlockCol.setEditable(true);
cellBlockCol.setMinWidth(100);
TableColumn heightCol = new TableColumn("Height");
heightCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("height")
);
heightCol.setEditable(true);
heightCol.setMinWidth(100);
TableColumn weightCol = new TableColumn("Weight");
weightCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("weight")
);
weightCol.setEditable(true);
weightCol.setMinWidth(100);
TableColumn ethnicityCol = new TableColumn("Ethnicity");
ethnicityCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("ethnicity")
);
ethnicityCol.setEditable(true);
ethnicityCol.setMinWidth(100);
TableColumn arrestDateCol = new TableColumn("Arrest Date(s)");
arrestDateCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("arrestDate")
);
arrestDateCol.setMinWidth(150);
TableColumn courtDateCol = new TableColumn("Court Date(s)");
courtDateCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("courtDate")
);
courtDateCol.setMinWidth(150);
TableColumn releaseDateCol = new TableColumn("Release Date(s)");
releaseDateCol.setCellValueFactory(
new PropertyValueFactory<Inmate,String>("releaseDate")
);
releaseDateCol.setMinWidth(150);
//add values to tableview
tableView.getColumns().addAll(inmateIDCol, firstNameCol, lastNameCol, cellBlockCol, heightCol, weightCol, ethnicityCol, arrestDateCol, courtDateCol, releaseDateCol);
//textfields to add a new inmate
HBox hb1 = new HBox();
hb1.setPadding(new Insets (10));
hb1.setSpacing(20);
HBox hb2 = new HBox();
hb2.setSpacing(20);
hb2.setPadding(new Insets (10));
TextField addFName = new TextField();
addFName.setPromptText("First Name");
addFName.setMaxWidth(200);
TextField addLName = new TextField();
addLName.setPromptText("Last Name");
addLName.setMaxWidth(200);
TextField addID = new TextField();
addID.setPromptText("ID Number");
addID.setMaxWidth(150);
TextField addCellBlock = new TextField();
addCellBlock.setPromptText("Cell Block");
addCellBlock.setMaxWidth(150);
TextField addHeight = new TextField();
addHeight.setPromptText("Height");
addHeight.setMaxWidth(175);
TextField addWeight = new TextField();
addWeight.setPromptText("Weight");
addWeight.setMaxWidth(175);
TextField addEthnicity = new TextField();
addEthnicity.setPromptText("Ethinicty");
addEthnicity.setMaxWidth(175);
//datePickers for all date adding
DatePicker addArrestDate = new DatePicker();
addArrestDate.setOnAction(e -> {
LocalDate date = addArrestDate.getValue();
arrestDate = java.sql.Date.valueOf(date);
//System.out.println("Selected date: " + arrestDate);
});
DatePicker addCourtDate = new DatePicker();
addArrestDate.setOnAction(e -> {
LocalDate date = addCourtDate.getValue();
courtDate = java.sql.Date.valueOf(date);
//System.out.println("Selected date: " + courtDate);
});
DatePicker addReleaseDate = new DatePicker();
addArrestDate.setOnAction(e -> {
LocalDate date = addReleaseDate.getValue();
releaseDate = java.sql.Date.valueOf(date);
//System.out.println("Selected date: " + releaseDate);
});
//button to add new inmate
Button addButton = new Button("ADD NEW INMATE");
addButton.setOnAction(e -> {
IDNum = getInt(addID.getText());
inmateList.add(new Inmate(
addFName.getText(),
addLName.getText(),
addID.getText(),
addCellBlock.getText(),
addHeight.getText(),
addWeight.getText(),
addEthnicity.getText(),
arrestDate,
courtDate,
releaseDate));
addFName.clear();
addLName.clear();
addID.clear();
addCellBlock.clear();
addHeight.clear();
addWeight.clear();
addEthnicity.clear();
tableView.refresh();
});
//labels for datepickers
Label arrDate = new Label("Arrest Date:");
arrDate.setFont(new Font("Arial", 18));
Label courtDate = new Label("Court Date:");
courtDate.setFont(new Font("Arial", 18));
Label relDate = new Label("Release Date:");
relDate.setFont(new Font("Arial", 18));
Label addNewInmate = new Label("Add New Inmate:");
addNewInmate.setFont(new Font("Arial", 20));
tableView.setItems(inmateList);
//add new inmate textfields and datepickers to view
hb1.getChildren().addAll( addID, addFName, addLName, addCellBlock, addHeight, addWeight, addEthnicity);
hb2.getChildren().addAll(arrDate, addArrestDate, courtDate, addCourtDate, relDate, addReleaseDate, addButton);
VBox vbox = new VBox();
vbox.setSpacing(5);
vbox.setPadding(new Insets(10, 0, 0, 10));
vbox.getChildren().addAll(label, tableView, addNewInmate, hb1, hb2);
//create date piceker test
StackPane root = new StackPane();
root.getChildren().add(vbox);
Scene scene = new Scene(root, 1400, 700);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
public ObservableList<Inmate> buildInmates()
{
inmateList = observableArrayList();
inmateList.add( new Inmate("Joseph", "Levitt", "0001001", "Minimum", "6'1", "205.0", "White",new Date(2014, 14,7), new Date(2014, 30, 6), new Date(2002, 30, 9)));
inmateList.add( new Inmate("Steve", "Smith", "0001002", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Jordan", "Jones", "0001003", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Samuel", "Adams", "0001004", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Billy", "Joel", "0001006", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Jose", "Cabron", "0001008", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Clark", "Kent", "0001010", "Isolation", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Peter", "Parker", "0001012", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Darrel", "Belk", "0001013", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Shaun", "Stanberry", "0002001", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Kemar", "Adjiboue", "0002002", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Paul", "Blart", "0002003", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Ted", "Bundy", "0002006", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Jeffrey", "Jones", "0002004", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Geoffrey", "Pittman", "0002009", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Michael", "Kersch", "0001021", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Parker", "Smith", "0001022", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Craig", "Robinson", "0001023", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Nigel", "Thornberry", "0001024", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Miguel", "Hinehosa", "0001031", "Minimum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("Charles", "Darwin", "0002015", "Isolation", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
inmateList.add( new Inmate("William", "Wundt", "0002007", "Maximum", "6'1", "205.0", "White", new Date( 2014, 14,7), new Date( 2014, 30, 6), new Date( 2002, 30, 9)));
return null;
}
这是犯人类：
public class Inmate {
//variables
SimpleStringProperty fName;
SimpleStringProperty lName;
SimpleStringProperty cellBlock;
SimpleStringProperty IDNumber;
SimpleStringProperty height; //initialized with ("#'#")
SimpleStringProperty weight ;
SimpleStringProperty ethnicity;
Date arrestDate;
Date courtDate;
Date releaseDate;
//String visitors;
String s;
Format formatter = new SimpleDateFormat("dd-MMM-yy");
public Inmate()
{
//Default Constructor
fName = new SimpleStringProperty("Jon");
lName = new SimpleStringProperty("Doe");
cellBlock = new SimpleStringProperty("Minimum Security");
IDNumber = new SimpleStringProperty("00000001");
height = null;
weight = new SimpleStringProperty("0.0");
ethnicity = new SimpleStringProperty("Unknown");
arrestDate = new Date();
courtDate = new Date();
releaseDate = new Date();
}
//minimal constructor
public Inmate(String fName, String lName, String IDNumber, String cellBlock)
{
this.fName = new SimpleStringProperty(fName);
this.lName = new SimpleStringProperty(lName);
this.cellBlock = new SimpleStringProperty(cellBlock);
this.IDNumber = new SimpleStringProperty(IDNumber);
height = null;
weight = new SimpleStringProperty("0.0");
ethnicity = new SimpleStringProperty("Unknown");
arrestDate = new Date();
courtDate = new Date();
releaseDate = new Date();
}
//full constructor
public Inmate(String fName, String lName, String IDNumber, String cellBlock, String height, String weight, String ethnicity, Date arrestDate, Date courtDate, Date releaseDate)
{
this.fName = new SimpleStringProperty(fName);
this.lName = new SimpleStringProperty(lName);
this.cellBlock = new SimpleStringProperty(cellBlock);
this.IDNumber = new SimpleStringProperty(IDNumber);
this.height = new SimpleStringProperty(height);
this.weight = new SimpleStringProperty(weight);
this.ethnicity = new SimpleStringProperty(ethnicity);
this.arrestDate = arrestDate;
this.courtDate = courtDate;
this.releaseDate = releaseDate;
}
//set and get first name
public void setFName(String name)
{
this.fName.set(name);
}
public String getFName()
{
return fName.get();
}
//get and set last name
public void setLname(String name)
{
this.lName.set(name);
}
public String getLName()
{
return lName.get();
}
//set and get cell block
public void setCellBlock(String cell)
{
this.cellBlock.set(cell);
}
public String getCellBlock()
{
return cellBlock.get();
}
//set and get ID number
public void setIDNumber(String num)
{
this.IDNumber.set(num);
}
public String getID()
{
return IDNumber.get();
}
//set and get height
public void setHeight(String height)
{
this.height.set( height);
}
public String getHeight()
{
return height.get();
}
//set and get weight
public void setWeight(String weight)
{
this.weight.set(weight);
}
public String getWeight()
{
return weight.get();
}
//set and get ethnicity
public void setEthnicity(String race)
{
this.ethnicity.set(race);
}
public String getEthnicity()
{
return ethnicity.get();
}
//set and get arrest date
public void setArrestDate (Date date)
{
arrestDate = date;
}
public String getArrestDate()
{
return formatter.format(arrestDate);
}
//set adn get court date
public void setCourtDate (Date date)
{
courtDate = date;
}
public String getCourtDate()
{
return formatter.format(courtDate);
}
//set and get release date
public void setReleaseDate(Date date)
{
releaseDate = date;
}
public String getReleaseDate()
{
return formatter.format(releaseDate);
}
}