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[英]Jenkins : System.out.println is not printing anything on console window
[英]Console not printing anything
它沒有打印任何東西,沒有錯誤。 請幫助我解決他的錯誤。 我已經嘗試了三種打印方法,但仍然沒有一種可以工作,也沒有任何錯誤。
import java.util.ArrayList;
public class JavaEight {
public static void main(String args[])
{
ArrayList<Employee> Emp = new ArrayList<>();
Employee e1 = new Employee(101, "Ravi", "Delhi", "2000");
Employee e2 = new Employee(102, "Vineet", "Mangalore", "5000");
Employee e3 = new Employee(103, "Punit", "Mumbai", "3000");
Employee e4 = new Employee(104, "Shruti", "Banglore", "6000");
Employee e5 = new Employee(105, "Ritu", "Hyderabad", "8000");
for(int i=0; i<Emp.size();i++)
{
Employee e = (Employee)Emp.get(i);
System.out.println(e);
}
Emp.forEach(i -> System.out.println(Emp));
for(Employee i : Emp)
{
System.out.println(Emp);
}
}
}
emp.add(e1); 等丟失
您已經創建了員工對象,但沒有將它們添加到列表中。 因此列表是空白的,並且不打印任何內容
在您的 ArrayList 中添加 Employee。
ArrayList<Employee> Emp = new ArrayList<>();
Employee e1 = new Employee(101, "Ravi", "Delhi", "2000");
Employee e2 = new Employee(102, "Vineet", "Mangalore", "5000");
Employee e3 = new Employee(103, "Punit", "Mumbai", "3000");
Employee e4 = new Employee(104, "Shruti", "Banglore", "6000");
Employee e5 = new Employee(105, "Ritu", "Hyderabad", "8000");
Emp.add(e1);
Emp.add(e2);
Emp.add(e3);
Emp.add(e4);
Emp.add(e5);
希望,它會解決您的問題。
這是因為您的 ArrayList Emp 是空的。 您已創建 Employee 對象,但尚未將其添加到 Emp。 像 Emp.add(e1) 一樣將它添加到 Emp。
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