java - Java从JTextField存储变量以用于公式中

我在将变量从JTextField存储到变量中以执行二次公式时遇到麻烦。

public void actionPerformed(ActionEvent event) {

    int a, b, c; //ax^2 + bx + c

    //retrieving whatever is in textfield
    String text1 = a1.getText();   //HERE IS WHERE I AM HAVING TROUBLE
    String text2 = b2.getText();
    String text3 = c3.getText();


    //retrieving what is in tf and storing it
    a = Integer.parseInt(text1);
    b = Integer.parseInt(text2); //TO PLACE INTO HERE
    c = Integer.parseInt(text3);

    // compute the discriminate
    double discriminate = Math.pow(b, 2) - (4 * a * c);

    //compute roots
    double root1 = ((-1 * b) + discriminate) / (2 * a); //TO USE INTO HERE
    double root2 = ((-1 * b) - discriminate) / (2 * a);

    result.setText(Double.toString(root1 + root2));
}

最佳答案

您应该输出两个根，但最后一行是将两个根相加并显示总和：

例如，如果您计算，root1 == 1和root2 == 3的两个根，则您的行

result.setText(Double.toString(root1 + root2));

将显示4您真正想要的是1,3之类的内容。下一行将执行此操作

result.setText(root1 + ","+ root2);;