标题翻译
How can I make a for loop that will display 8 TextFields in javaFx
问题
这是我目前所拥有的代码...
int nums = 8;
for (int j = 0; j < nums; j++) {
TextField test = new TextField();
test.setAlignment(Pos.CENTER);
}
this.getChildren().add(test);
我尝试过类似 TextField 'test' + j = new TextField(); 的方式，以便创建 test1、test2、test3 等，但这会导致语法错误。我不太确定如何以其他方式进行操作。
英文翻译
This is currently the code that I have so far...
int nums = 8;
for (int j = 0; j < nums; j++) {
TextField test = new TextField();
test.setAlignment(Pos.CENTER);
}
this.getChildren().add(test);
I have tried doing somehting like TextField 'test' + j = new TextField(); so that it would create test1, test2, test3 ect. but that gave syntax errors. Not really sure on how I would go about this in any other way.
答案1
得分: 3
你需要将this.getChildren().add(test);这行代码放在for循环内部：
int nums = 8;
for (int j = 0; j < nums; j++) {
TextField test = new TextField();
test.setAlignment(Pos.CENTER);
this.getChildren().add(test);
}
英文翻译
You have to move this.getChildren().add(test); inside the for-loop:
int nums = 8;
for (int j = 0; j < nums; j++) {
TextField test = new TextField();
test.setAlignment(Pos.CENTER);
this.getChildren().add(test);
}
答案2
得分: 2
将它们添加到能够垂直堆叠它们的容器中。同时，确保将它们的添加调用放在仍然在作用域内的 test 所在的循环内。
VBox box = new VBox(5);
int nums = 8;
for (int j = 0; j < nums; j++) {
TextField test = new TextField();
test.setAlignment(Pos.CENTER);
box.getChildren().add(test);
}
this.getChildren().add(box);
英文翻译
Add them to something that allows them to stack vertically. Also, make sure your call to add them is inside the loop where test is still in scope.
VBox box = new VBox(5);
int nums = 8;
for (int j = 0; j < nums; j++) {
TextField test = new TextField();
test.setAlignment(Pos.CENTER);
box.getChildren().add(test);
}
this.getChildren().add(box);
答案3
得分: 0
@Dustin R的答案很好。我只是在补充更多内容。例如如何在每个创建的`TextField`上添加事件。
import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class TestingGroundsTwo extends Application
{
public static void main(String[] args)
{
launch(args);
}
@Override
public void start(Stage stage)
{
VBox root = new VBox();
for (int i = 0; i < 8; i++) {
TextField tempTextField = new TextField();//创建文本字段。
final int t = i;
tempTextField.setPromptText("我是文本字段 " + t);//将提示文本设置为便于识别文本字段。
//在文本字段上创建键盘事件处理事件。
tempTextField.setOnKeyReleased((event) -> {
System.out.println("您在文本字段 " + t + " 中键入了 " + event.getCode() + "。我的文本值是 " + tempTextField.getText());
});
root.getChildren().add(tempTextField);//将文本字段添加到父节点中。在这种情况下是 VBox。
}
Platform.runLater(() -> root.requestFocus());
stage.setTitle("Hello World!");
Scene scene = new Scene(root, 750, 600);
scene.setFill(Color.GHOSTWHITE);
stage.setScene(scene);
stage.show();
}
}
英文翻译
@Dustin R's answer is great. I am just adding more. Like how to any an event on each TextField created.
import javafx.application.Application;
import javafx.application.Platform;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class TestingGroundsTwo extends Application
{
public static void main(String[] args)
{
launch(args);
}
@Override
public void start(Stage stage)
{
VBox root = new VBox();
for (int i = 0; i < 8; i++) {
TextField tempTextField = new TextField();//Create the TextField.
final int t = i;
tempTextField.setPromptText("I am TextField " + t);//Set prompt text to easily identify TextField
//Create key handlding event on the TextField
tempTextField.setOnKeyReleased((event) -> {
System.out.println("You typed " + event.getCode() + " in TextField " + t + ". My text value is " + tempTextField.getText());
});
root.getChildren().add(tempTextField);//Add the TextField to a parent node. In this case VBox.
}
Platform.runLater(() -> root.requestFocus());
stage.setTitle("Hello World!");
Scene scene = new Scene(root, 750, 600);
scene.setFill(Color.GHOSTWHITE);
stage.setScene(scene);
stage.show();
}
}
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