[ java ] in KIDS 글 쓴 이(By): juyup (이지훈) 날 짜 (Date): 1997년11월02일(일) 11시24분34초 ROK 제 목(Title): [프로젝트1소스] import java.awt.*; import java.applet.Applet; public class Calculator extends Applet { Panel WholeArea; TextField display; Panel bottom; Panel func_panel; Panel num_panel; Button clear_but; Button number[] = new Button[10]; Button function[] = new Button[6]; float last_num = 0; char last_func = ' '; public boolean action(Event evt, Object what){ if(evt.target instanceof Button) { char but_val = ((Button)evt.target).getLabel().charAt(0); switch(but_val){ case '+': case '*': case '-': case '/': last_num = Float.valueOf(display.getText()).floatValue(); last_func = but_val; display.setText(""); break; case 'C': display.setText("0"); break; case 's': float curr_num = 0; float result = 0; curr_num = Float.valueOf(display.getText()).floatValue(); result = curr_num * curr_num; display.setText(String.valueOf(result)); break; case '=': curr_num = 0; result = 0; curr_num = Float.valueOf(display.getText()).floatValue(); if(last_func != ' '){ switch(last_func){ case '+' : result = last_num + curr_num; break; case '*' : result = last_num * curr_num; break; case '-' : result = last_num - curr_num; break; case '/' : result = last_num / curr_num; break; } last_num = result; display.setText(String.valueOf(result)); } break; default : if(display.getText() == "0") display.setText(""); display.setText(display.getText() + but_val); }// end of switch return true; } // end of if return false; } public void init() { WholeArea = new Panel(); WholeArea.setLayout(new GridLayout(3, 1)); display = new TextField(10); WholeArea.add(display); clear_but = new Button("Clear"); WholeArea.add(clear_but); bottom = new Panel(); bottom.setLayout(new BorderLayout()); num_panel = new Panel(); num_panel.setLayout(new GridLayout(4,3)); for(int i=7; i>0; i=i-3) { for(int j=0; j<3; j++){ number[i+j] = new Button((new String()).valueOf(i+j)); num_panel.add(number[i+j]); } } number[0] = new Button((new String()).valueOf(0)); num_panel.add(number[0]); function[4] = new Button("sqrt"); num_panel.add(function[4]); function[5] = new Button("="); num_panel.add(function[5]); bottom.add("Center", num_panel); func_panel = new Panel(); func_panel.setLayout(new GridLayout(4, 1)); function[0] = new Button("+"); func_panel.add(function[0]); function[1] = new Button("-"); func_panel.add(function[1]); function[2] = new Button("*"); func_panel.add(function[2]); function[3] = new Button("/"); func_panel.add(function[3]); bottom.add("East", func_panel); WholeArea.add(bottom); add(WholeArea); } } |