用NumberFormat设两位小数,空格的话可以在输出语句中间加个空格
不知道你这个问题是否已经解决, 如果还没有解决的话:import java.io.Serializable;
public class Student implements Serializable{
private String name ;
private int age ;
private int grade ;
public Student(String name, int age, int grade) {
this.name = name ;
this.age = age ;
this.grade = grade ;
}
public void setName(String name) {
this.name = name;
}
public void setAge(int age) {
this.age = age ;
}
public void setGrade(int grade) {
this.grade = grade;
}
public String getName() {
return this.name;
}
public int getAge() {
return this.age;
}
public int getGrade() {
return this.grade;
}
public Student() {
}
public String toString() {
return name+" "+age+" "+grade;
}
}