Java编写的计算器程序及源代码 - 编程入门网
作者 佚名技术
来源 NET编程
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发布时间 2012-06-20
| parseDouble(textAnswer.getText()); break; case 2: answerd *= Double.parseDouble(textAnswer.getText()); break; case 3: if (Double.parseDouble(textAnswer.getText()) == 0) { textAnswer.setText("除数不能为零"); clickable = false; } else answerd /= Double.parseDouble(textAnswer.getText()); break; default: answerd = Double.parseDouble(textAnswer.getText()); } textAnswer.setText(""); prekey = key = 3; } } //''=''操作 if (temp == buttonEqual && clickable == true) { //如果连续按''='',则进行连续运算 if (prekey == 5) { if (key == 0) { answerd += vard; textAnswer.setText(df.format(answerd)); } if (key == 1) { answerd -= vard; textAnswer.setText(df.format(answerd)); } if (key == 2) { answerd *= vard; textAnswer.setText(df.format(answerd)); } if (key == 3) { if (Double.parseDouble(textAnswer.getText()) == 0) { textAnswer.setText("除数不能为零"); clickable = false; } else { answerd /= vard; textAnswer.setText(df.format(answerd)); } } } else { vard = Double.parseDouble(textAnswer.getText()); if (key == 0) { prekey = -1; answerd += Double.parseDouble(textAnswer.getText()); textAnswer.setText(df.format(answerd)); } if (key == 1) { prekey = -1; answerd -= Double.parseDouble(textAnswer.getText()); textAnswer.setText(df.format(answerd)); } if (key == 2) { prekey = -1; answerd *= Double.parseDouble(textAnswer.getText()); textAnswer.setText(df.format(answerd)); } if (key == 3) { prekey = -1; if (Double.parseDouble(textAnswer.getText()) == 0) { textAnswer.setText("除数不能为零"); clickable = false; } else { answerd /= Double.parseDouble(textAnswer.getText()); textAnswer.setText(df.format(answerd)); } } } prekey = 5; } //''%''操作，对第二个操作数除以100 if (temp == buttonMod && clickable == true) { if (answerd == 0) { String s = textAnswer.getText(); textAnswer.setText(s); } else { boolean isDot = false; for (int i = 0; i < textAnswer.getText().length(); i++) if (''.'' == textAnswer.getText().charAt(i)) { isDot = true; break; } |
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