import javax.swing.*;import java.awt.event.*;class Counter extends WindowAdapter { static JFrame f=new JFrame("计算器");static JTextField text1=new JTextField("0.");static String source="";static String cal="";static String object="";static boolean flag=false;static boolean fl...
import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JTextField;class Stack_Float { float nums[];int top;Stack_Float(){ nums = new float[50];top = -1;} boolean IsEmpty(){ if (top == ...
case 0 : tf1.setText(""+(x+y));break; case 1 : tf1.setText(""+(x-y));break; case 2 : tf1.setText(""+(x*y));break; case 3 : tf1.setText(""+(x/y));break; } } else if(e2.getSource()==b24)//单击"."按钮输入小数 { if(tf1.getText().trim().indexOf(′.′)...
import java.awt.*;import java.awt.event.*;public class Calculator extends WindowAdapter implements ActionListener { private double result=0,data1=0,radixPointDepth=1;private boolean radixPointIndicate=false,resultIndicate=false;private char prec='+';private Frame f;private TextField tf;...
addComponent(layout, numbers[1], 1, 0, 1, 1);addComponent(layout, numbers[2], 1, 1, 1, 1);addComponent(layout, numbers[3], 1, 2, 1, 1);addComponent(layout, numbers[4], 2, 0, 1, 1);addComponent(layout, numbers[5], 2, 1, 1, 1);addComponent(layout, numbers...