aaa.rar_JAVA 用户 界面 加减乘除_Java GUI计算器_aaa_java 混合 运算 计算器_计算器

import java.awt.*; import java.awt.event.*; public class ex_1 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; private Button b1,b2,b3,b4,b5,b6,b7,b8,b9,b10,b11,b12,b13,b14,b15,b16; private Panel p; static public void main(String args[]){ ex_1 de=new ex_1(); de.go(); } public void go(){ f=new Frame(); p=new Panel(); p.setLayout(new GridLayout(4,4)); tf=new TextField(30); b1=new Button("7"); b2=new Button("8"); b3=new Button("9"); b4=new Button("+"); b5=new Button("4"); b6=new Button("5"); b7=new Button("6"); b8=new Button("-"); b9=new Button("1"); b10=new Button("2"); b11=new Button("3"); b12=new Button("*"); b13=new Button("0"); b14=new Button("."); b15=new Button("="); b16=new Button("/"); f.add(tf,"North"); f.add(p,"Center"); p.add(b1); p.add(b2); p.add(b3); p.add(b4); p.add(b5); p.add(b6); p.add(b7); p.add(b8); p.add(b9); p.add(b10); p.add(b11); p.add(b12); p.add(b13); p.add(b14); p.add(b15); p.add(b16); b1.addActionListener(this); b2.addActionListener(this); b3.addActionListener(this); b4.addActionListener(this); b5.addActionListener(this); b6.addActionListener(this); b7.addActionListener(this); b8.addActionListener(this); b9.addActionListener(this); b10.addActionListener(this); b11.addActionListener(this); b12.addActionListener(this); b13.addActionListener(this); b14.addActionListener(this); b15.addActionListener(this); b16.addActionListener(this); f.addWindowListener(this); f.setSize(300,200); f.setVisible(true); } public void actionPerformed(ActionEvent e){ String s; s=e.getActionCommand(); switch(s.charAt(0)){ case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': if(resultIndicate){ result=0; data1=0; } Integer Int1=new Integer(s); if(radixPointIndicate){ radixPointDepth=radixPointDepth/10; data1=data1+(Int1.intValue())*radixPointDepth; } else{ data1=data1*10+(Int1.intValue()); } Double displayNumber=new Double(data1); tf.setText(displayNumber.toString()); resultIndicate=false; break; case '+': case '-':case '*':case '/':case '=': if(s.charAt(0)!='='&&resultIndicate){ prec=s.charAt(0); resultIndicate=false; } else{ switch(prec){ case '+': result=result+data1; break; case '-': result=result-data1; break; case '*': result=result*data1; break; case '/': result=result/data1; break; } } radixPointIndicate=false; radixPointDepth=1; displayNumber=new Double(result); tf.setText(displayNumber.toString()); if(s.charAt(0)!='='){ data1=0; prec=s.charAt(0); } else{ resultIndicate=true; } break; case '.': radixPointIndicate=true; break; } } public void windowClosing(WindowEvent e){ System.exit(0); } }