在Backand中,在我创建了一个对象并在数据库中为其提供数据后,我想回去为我忽略的字段添加默认值。在GUI中,似乎有一个字段: public static void main(String[] args) {
double Xp;
double Yp;
double Xq;
double Yq;
Scanner reader = new Scanner(System.in);
System.out.print("Enter x- cordinate of P : ");
Xp = reader.nextDouble();
System.out.print("Enter y- cordinate of P : ");
Yp = reader.nextDouble();
System.out.print("Enter x- cordinate of Q : ");
Xq = reader.nextDouble();
System.out.print("Enter y- cordinate of Q : ");
Yq = reader.nextDouble();
Point q = new Point("Q", Xq, Yq);
Point p = new Point("P", Xp, Yp);
System.out.println("Point " + p.getName() + "'s Coordinates are: " + "P(" + p.getX() + " , " + p.getY() + ")");
System.out.println("Point " + q.getName() + "'s Coordinates are: " + "Q(" + q.getX() + " , " + q.getY() + ")");
System.out.println("The Euclidean distance from p to q is :" + getEuclideanDistance(p, q));
}
,但它是灰色的,我无法弄清楚如何使用它。
任何帮助都将不胜感激。
答案 0 :(得分:3)
在模型中完成添加默认值。在UI中,您可以编辑字段并提供默认值,或者在JSON模型中添加此标记:
" defaultValue":100
字段对象如下所示:
"价格":{ "输入":" float", " defaultValue":100 }