Java SE (Java Platform, Standard Edition)

Hi, can anyone explain why the following example has different outputs in Java 7 and Java 8? This example simple shows what kind of problem I am facing in my JavaFX application when I run it using Java 8. Is the problem really that 33.3 + 33.3 + 33.3 != 100 but Java 7 didn't mind? The following example results in small window using Java 7 and very wide window using Java 8.

{code}

import java.util.ArrayList;

import java.util.List;

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.control.Label;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.ColumnConstraints;

import javafx.scene.layout.GridPane;

import javafx.stage.Stage;

public class BetpalFXApplication extends Application {

    @Override

    public void start(Stage stage) throws Exception {

        GridPane root = createGrid();

        stage.setScene(new Scene(root));

        stage.show();

    }

    private GridPane createGrid() {

        BorderPane left = new BorderPane();

        left.setStyle("-fx-background-color: red");

        left.setCenter(new Label("left"));

        BorderPane middle = new BorderPane();

        middle.setStyle("-fx-background-color: yellow");

        middle.setCenter(new Label("middle"));

        BorderPane right = new BorderPane();

        right.setStyle("-fx-background-color: blue");

        right.setCenter(new Label("right"));

        GridPane root = new GridPane();

        double[] widthPercentColumnConstraintsThree = { 33.3, 33.3, 33.3 };

        setColumnConstraints(root, widthPercentColumnConstraintsThree);

        root.add(left, 0, 0);

        root.add(middle, 1, 0);

        root.add(right, 2, 0);

        return root;

    }

    private void setColumnConstraints(GridPane gridPane, double[] widthPercentColumnConstraints) {

        List<ColumnConstraints> listOfColumnConstraints = new ArrayList<ColumnConstraints>();

        for (double widthPercentColumnConstraint : widthPercentColumnConstraints) {

            ColumnConstraints columnConstraints = new ColumnConstraints();

            columnConstraints.setPercentWidth(widthPercentColumnConstraint);

            listOfColumnConstraints.add(columnConstraints);

        }

        gridPane.getColumnConstraints().setAll(listOfColumnConstraints);

    }

    public static void main(String[] args) {

        Application.launch(args);

    }

}

{code}