问题描述
我正在尝试制作一个程序,让用户选择操作,然后在 JTextField
中出现两个随机数,并且用户应该将答案放在另一个文本字段中,我正在尝试检查天气结果等于或不等于答案文本字段,然后在文本字段中显示错误或正确。但它总是显示“false”。
这是我的方法:
public cal() {
initComponents();
}
Scanner input= new Scanner(system.in);
double result,ans,ad;
String opr;
double num1= ((int)(Math.random()*100));
String str1= Double.toString(num1);
double num2= ((int)(Math.random()*100));
String str2= Double.toString(num2);
@SuppressWarnings("unchecked")
private void initComponents() {
jFrame1 = new javax.swing.JFrame();
jlayeredPane1 = new javax.swing.JlayeredPane();
jSeparator1 = new javax.swing.JSeparator();
jLabel1 = new javax.swing.JLabel();
jLabel2 = new javax.swing.JLabel();
adbut = new javax.swing.JRadioButton();
subbut = new javax.swing.JRadioButton();
divbut = new javax.swing.JRadioButton();
mulbut = new javax.swing.JRadioButton();
jLabel3 = new javax.swing.JLabel();
opersign = new javax.swing.JTextField();
n1 = new javax.swing.JTextField();
n2 = new javax.swing.JTextField();
jLabel4 = new javax.swing.JLabel();
answer = new javax.swing.JTextField();
checkbut = new javax.swing.JButton();
dis = new javax.swing.JTextField();
);
pack();
}// </editor-fold>
private void adbutActionPerformed(java.awt.event.ActionEvent evt) {
opersign.setText("+");
opr="+";
n1.setText(str1);
n2.setText(str2);
}
private void subbutActionPerformed(java.awt.event.ActionEvent evt) {
opersign.setText("-");
opr="-";
n1.setText(str1);
n2.setText(str2);
}
private void divbutActionPerformed(java.awt.event.ActionEvent evt) {
opersign.setText("/");
opr="/";
n1.setText(str1);
n2.setText(str2);
}
private void mulbutActionPerformed(java.awt.event.ActionEvent evt) {
opersign.setText("*");
opr="*";
n1.setText(str1);
n2.setText(str2);
}
private void disActionPerformed(java.awt.event.ActionEvent evt) {
}
private void n1ActionPerformed(java.awt.event.ActionEvent evt) {
}
private void opersignActionPerformed(java.awt.event.ActionEvent evt) {
}
private void n2ActionPerformed(java.awt.event.ActionEvent evt) {
}
private void answerActionPerformed(java.awt.event.ActionEvent evt) {
ans= Double.parseDouble(answer.getText());
}
private void checkbutActionPerformed(java.awt.event.ActionEvent evt) {
if(opr=="+") result= num1+num2;
else if(opr=="-") result= num1-num2;
else if(opr=="/") result= num1/num2;
else result= num1 * num2;
if(result != ans) dis.setText(" FALSE ");
else if (result == ans) dis.setText(" CORRECT!! ");
}
解决方法
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