我正在设计一个考勤系统，我的问题是我不知道如何显示输入形式的考勤。这是我的系统简介。
每个学生都有他们的矩阵编号和密码。用户将输入其矩阵编号和密码。如果矩阵编号和密码正确，系统将显示一个消息对话框。
我不知道如何保存输入然后将其显示到数组中。
源代码：
public class TESTARRAY {
public static void main(String[] args) {
String input1;
// Creating array
String[][] multi = { {"40604", "MUHAMAD SYAMIL HAIQAL BIN KAMARUZZAMAN",""},
{"40599","NIK MUHAMMAD 'INWAN BIN NIK ADNAN",""},
{"37027","HARNANI BINTI ABDUL MAJID",""},
{"37067","NURUL ASHIKIN BINTI MOHD FAZLI",""},
{"37064","NURLIYANA BINTI MOHD KAMAL",""},
{"37045","NADIATUL NAJIHAH BINTI MOHD NAZRI ",""},
{ "37065","NURSUHAILA BINTI MAD SALIM ",""}
};
printArray(multi);
}
public static void printArray(String[][] num1) {
String input2;
String input3;
int password;
int matricnumber;
int a = 0;
String input4;
boolean one = true;
String[] columnNames = { "MATRIX NUMBER", "NAME","ATTENENDE"};
String[][] input1 = new String[num1.length][num1[0].length];
for (int i = 0; i < input1.length; i++) {
for (int j = 0; j < input1[i].length; j++) {
input1[i][j] = num1[i][j];
}
}
DefaultTableModel model = new DefaultTableModel(input1, columnNames);
JTable table = new JTable(model);
JScrollPane scrollPane = new JScrollPane(table);
JOptionPane.showMessageDialog(null, scrollPane, "CLASS ATTENDANCE",
JOptionPane.INFORMATION_MESSAGE);
//for (int i = 0; i < 7; i++) {
while (one== true)
{
input2 = JOptionPane.showInputDialog("Please Enter Your Matric Number " );
matricnumber = Integer.parseInt(input2);
input3=JOptionPane.showInputDialog("Please Enter Your Password: " );
password = Integer.parseInt(input3);
input4=JOptionPane.showInputDialog("Attendende : " );
password = Integer.parseInt(input4);
if (matricnumber==40604&&password==11){
JOptionPane.showMessageDialog(null,"Hi "+num1[0][1]+""+num1[0][3]+" ("+input2+").\nYou have attend the class. Enjoy the class\nThank you " );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[0][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else if (matricnumber==40599&&password==22){
JOptionPane.showMessageDialog(null,"Hi "+num1[1][1]+""+num1[1][3]+" ("+input2+").\nYou have attend the class. Enjoy the class\nThank you" );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[1][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else if (matricnumber==37027&&password==33){
JOptionPane.showMessageDialog(null,"Hi "+num1[2][1]+""+num1[2][3]+" ("+input2+").\nYou have attend the class. Enjoy the class\nThank you" );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[2][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else if (matricnumber==37067&&password==44){
JOptionPane.showMessageDialog(null,"Hi "+num1[3][1]+""+num1[3][3]+" ("+input2+").\nYou have attend the class. Enjoy the class\nThank you" );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[3][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else if (matricnumber==37064&&password==55){
JOptionPane.showMessageDialog(null,"Hi "+num1[4][1]+""+num1[4][3]+" ("+input2+").\nYou have attend the class. Enjoy the class\nThank you" );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[4][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else if (matricnumber==37045&&password==66){
JOptionPane.showMessageDialog(null,"Hi "+num1[5][1]+""+num1[5][3]+" ("+input2+")\nYou have attend the class. Enjoy the class\nThank you" );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[5][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else if (matricnumber==37065&&password==77){
JOptionPane.showMessageDialog(null,"Hi "+num1[6][1]+""+num1[6][3]+" ("+input2+").\nYou have attend the class. Enjoy the class\nThank you" );
//JOptionPane.showMessageDialog(null,"The student that attend the class for today:\n"+num1[6][1]+" ("+input2+" )");
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"0":one=false;
break;
}
}
else
JOptionPane.showMessageDialog(null,"You are not the student in this class. GET OUT !!!" );
input4=JOptionPane.showInputDialog("Press 0 to stop or other number to continue " );
a = Integer.parseInt(input4);
switch(input4){
case"n":one=false;
break;
}
}
String input5;
String[][] ulti = { {"40604", "MUHAMAD SYAMIL HAIQAL BIN KAMARUZZAMAN","num1[0][2]"},
{"40599","NIK MUHAMMAD 'INWAN BIN NIK ADNAN","num2[1][3]"},
{"37027","HARNANI BINTI ABDUL MAJID","num2[2][3]"},
{"37067","NURUL ASHIKIN BINTI MOHD FAZLI","num2[3][3]"},
{"37064","NURLIYANA BINTI MOHD KAMAL","num2[4][3]"},
{"37045","NADIATUL NAJIHAH BINTI MOHD NAZRI ","num2[5][3]"},
{ "37065","NURSUHAILA BINTI MAD SALIM ","num2[6][3]"}
};
printA(ulti);
}
public static void printA(String[][] num2){
String[] columnNames = { "MATRIX NUMBER", "NAME","ATTENDENCE"};
String[][] input5 = new String[num2.length][num2[0].length];
for (int i = 0; i < input5.length; i++) {
for (int j = 0; j < input5[i].length; j++) {
input5[i][j] = num2[i][j];
}
}
DefaultTableModel model = new DefaultTableModel(input5, columnNames);
JTable table = new JTable(model);
JScrollPane scrollPane = new JScrollPane(table);
JOptionPane.showMessageDialog(null, scrollPane, "CLASS ATTENDANCE",
JOptionPane.INFORMATION_MESSAGE);
}
}
答案 0 :(得分：1)
你应该真正将数据提取到自己的类，如：
public class User {
String name;
int maxtrix;
int attend;
public User(int matrix, String name, int attend) {
this.name = name;
this.maxtrix = matrix;
this.attend = attend;
}
public boolean checkCredentials(int matrix, int attend) {
if (matrix == this.maxtrix && attend == this.attend) {
return true;
}
return false;
}
}
这个数据类与列表完美配合。看看：
public static void main(String[] args) {
List<User> users = new ArrayList<>();
// Creating users
users.add(new User(40604, "MUHAMAD SYAMIL HAIQAL BIN KAMARUZZAMAN", 0));
users.add(new User(40599, "NIK MUHAMMAD 'INWAN BIN NIK ADNAN", 0));
users.add(new User(37027, "HARNANI BINTI ABDUL MAJID", 0));
users.add(new User(37067, "NURUL ASHIKIN BINTI MOHD FAZLI", 0));
users.add(new User(37064, "NURLIYANA BINTI MOHD KAMAL", 0));
users.add(new User(37045, "NADIATUL NAJIHAH BINTI MOHD NAZRI ", 0));
users.add(new User(37065, "NURSUHAILA BINTI MAD SALIM ", 0));
printArray(users);
}
现在填写表格并检查用户输入更容易（您可以遍历用户列表并使用 checkCredentials 进行检查）
答案 1 :(得分：0)
首先创建一个包含所有用户输入的数组。
public boolean searchMultiArray(user_input){
boolean b=false;
for(int i=0; i<multi.length; i++){
if(java.utils.Arrays.equals(multi[i], user_input){
b=true;
break;
}
}
return b;
}
然后搜索二维数组中是否存在此数组。
if (n <= 0) {return 0} else if (n <= 2) {return 1;}