public void actionPerformed(ActionEvent ev) {
CalculatorAlt cal = new CalculatorAlt();
cal.addNum_working(" +/- ");
cal =
null; // setting object to null makes it more likely to be deleted by the Garbage
// Collector
// System.out.println("+/-");
}
public void actionPerformed(ActionEvent ev) {
CalculatorAlt cal = new CalculatorAlt();
setNum_memory(Double.parseDouble(cal.getNum_working()));
cal =
null; // setting object to null makes it more likely to be deleted by the Garbage
// Collector
// System.out.println("MS");
}
public void actionPerformed(ActionEvent ev) {
CalculatorAlt cal = new CalculatorAlt();
double temp_working = Double.parseDouble(cal.getNum_working());
double temp_memory = cal.getNum_memory();
double three = temp_working + temp_memory;
setNum_memory(three);
setNum_working(String.valueOf(three));
cal =
null; // setting object to null makes it more likely to be deleted by the Garbage
// Collector
// System.out.println("MA");
}
public void actionPerformed(ActionEvent ev) {
// System.out.println("0");
CalculatorAlt cal = new CalculatorAlt();
String num_n = cal.getNum_working();
if (num_n.length() > 0) {
cal.addNum_working("0");
} else {
cal.addNum_working("");
}
cal =
null; // setting object to null makes it more likely to be deleted by the Garbage
// Collector
}
public void actionPerformed(ActionEvent ev) {
double num_a = 0;
String num_operator = "";
double num_b = 0;
int num_length = 0;
double num_answer = 0;
CalculatorAlt cal = new CalculatorAlt();
// System.out.println("num_working = " + cal.getNum_working());
// String num_working_last_3 = cal.getNum_working().substring(Math.max(0,
// cal.getNum_working().length() - 3)); // get last 3 characters in string
String delims = " ";
String[] tokens = cal.getNum_working().split(delims);
for (int i = 0; i < tokens.length; i++) {
num_length++;
}
if (num_length == 2) {
num_a = Double.parseDouble(tokens[0]);
num_operator = tokens[1];
} else {
num_a = Double.parseDouble(tokens[0]);
num_operator = tokens[1];
num_b = Double.parseDouble(tokens[2]);
}
System.out.println(num_a);
System.out.println(num_operator);
System.out.println(num_b);
// first we check when "=" is pushed what the num_operator is
// then compare num_operator and do stuff
// sqrt
if (num_operator.equals("+")) {
num_answer = num_a + num_b;
} else if (num_operator.equals("-")) {
num_answer = num_a - num_b;
} else if (num_operator.equals("*")) {
num_answer = num_a * num_b;
} else if (num_operator.equals("/")) {
num_answer = num_a / num_b;
} else if (num_operator.equals("sqrt")) {
if (num_length == 2) {
num_answer = num_a * num_a;
} else {
double num_c = num_a;
for (int i = 1; i < num_b; i++) {
num_c = num_c * num_a;
}
num_answer = num_c;
}
} else if (num_operator.equals("1/x")) {
num_answer = Math.sqrt(num_a);
} else if (num_operator.equals("%")) {
num_answer = (num_b / 100) * num_a;
} else if (num_operator.equals("+/-")) {
if (num_a < 0) {
num_answer = Math.abs(num_a);
} else {
num_answer = -num_a;
}
}
// reset the whole lot
setNum_working("");
setTextInput(String.valueOf(num_answer));
num_length = 0;
// setTextFunction(" = ");
}