Java简易计算器制作

import java.awt.*; import java.awt.event.*; import javax.swing.*; public class Calculator extends JFrame implements ActionListener{ JFrame jf; JTextField jtf; JButton jishu = new JButton("="); String sign[] = new String[]{"+","-","*","/","."}; String ops[] = new String[]{"cancel","clear"}; private int temp=0; private float result =0; private float fnumber=0,bnumber=0; public Calculator(){ init(); } public void init(){ jf = new JFrame(); jtf = new JTextField(); Container c = jf.getContentPane();//Return the contentPane object for this frame. jtf.setHorizontalAlignment(JTextField.RIGHT);//设置文本的水平对齐方式