javafx 选课系统

/*
 * To change this template choose Tools | Templates
 * and open the template in the editor.
 */
package org.tjumyk;

import com.sun.deploy.uitoolkit.impl.fx.ui.FXAboutDialog;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Platform;

/**
 *
 * @author E40-G8C
 */
public abstract class BackgroundRunner {

    private boolean waitForeground = false;

    /**
	 * @tag label
	 * name = “Abstract“
	 */
    public abstract void background（） throws Exception;

    public void foreground（） throws Exception {
    }

    public abstract void handleException（Exception e） throws Exception;

    public abstract void finish（） throws Exception;

    protected final void runForeground（） {
        waitForeground = true;
        Platform.runLater（new Thread（） {
            @Override
            public void run（） {
                try {
                    foreground（）;
                } catch （Exception ex） {
                    try {
                        handleException（ex）;
                    } catch （Exception ex1） {
                        ex1.printStackTrace（）;
                    }
                }
                waitForeground = false;
            }
        }）;
        while （waitForeground） {
            try {
                Thread.sleep（10）;
            } catch （InterruptedException ex） {
                ex.printStackTrace（）;
            }
        }
    }

    private void handleExceptionInFxThread（final Exception e） {
        Platform.runLater（new Thread（） {
            @Override
            public void run（） {
                try {
                    handleException（e）;
                } catch （Exception ex） {
                    ex.printStackTrace（）;
                }
            }
        }）;
    }

    public final void run（） {
        new Thread（） {
            @Override
            public void run（） {
                try {
                    background（）;
                    Platform.runLater（new Thread（） {
                        @Override
                        public void run（） {
                            try {
                                finish（）;
                            } catch （Exception ex） {
                                try {
                                    handleException（ex）;
                                } catch （Exception ex1） {
                                    ex1.printStackTrace（）;
                                }
                            }
                        }
                    }）;
                } catch （final Exception e） {
                    handleExceptionInFxThread（e）;
                }
            }
        }.start（）;
    }
}