Java 如何以行和列的形式在arraylist中存储数据
我可以选择添加新行以添加学生详细信息Java 如何以行和列的形式在arraylist中存储数据,java,html,arraylist,Java,Html,Arraylist,我可以选择添加新行以添加学生详细信息 <table> Name:<tr><td><input type="text" name="sname"></td></tr> Id:<tr><td><input type="text" name="sid></td></tr> </table> <input type="button value="Add
<table>
Name:<tr><td><input type="text" name="sname"></td></tr>
Id:<tr><td><input type="text" name="sid></td></tr>
</table>
<input type="button value="Add new row">
使Student类具有字段名称和ID,并将此对象存储到ArrayList中。
公共类Student{
public class Student {
private String name;
private int id;
public Student(int id, String name) {
this.id = id;
this.name = name;
}
@Override
public String toString() {
return String.format("[\"%s\", %s]", this.name, this.id);
}
}
List<Student> students = new ArrayList<>();
students.add(new Student(1, "Pooja"));
students.add(new Student(2, "Priya"));
// {["Pooja", 1],["Priya", 2]}
System.out.print(students.stream().map(Object::toString).collect(Collectors.joining(",", "{", "}")));
私有字符串名称;
私有int-id;
公立学生(整数id,字符串名称){
this.id=id;
this.name=名称;
}
@凌驾
公共字符串toString(){
返回String.format(“[\%s\,%s]”,this.name,this.id);
}
}
List students=new ArrayList();
添加(新学生(1,“Pooja”);
学生。添加(新学生(2,“Priya”);
//{[“Pooja”,1],“Priya”,2]}
System.out.print(students.stream().map(Object::toString.collect(Collectors.joining(“,”,“{,“}”));
你能用代码解释一下吗。。我需要在arraylist中逐行显示
public class Student {
private String name;
private int id;
public Student(int id, String name) {
this.id = id;
this.name = name;
}
@Override
public String toString() {
return String.format("[\"%s\", %s]", this.name, this.id);
}
}
List<Student> students = new ArrayList<>();
students.add(new Student(1, "Pooja"));
students.add(new Student(2, "Priya"));
// {["Pooja", 1],["Priya", 2]}
System.out.print(students.stream().map(Object::toString).collect(Collectors.joining(",", "{", "}")));