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java£ºStudentÀà

package collection;
public class Student {
 
 public Student() {}
  
 public Student(String name, String sex, int age) {
  this.name = name;
  this.sex = sex;
  this.age = age;
 }
 @Override
 public String toString() {
  return "Student [toString()=" + this.name+"-->"+ this.sex +"-->"+ this.age + "]";
 }
 private String name;
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public String getSex() {
  return sex;
 }
 public void setSex(String sex) {
  this.sex = sex;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 private String sex;
 private int age;
}


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java£ºdoubleÀàÐͽØÈ¡Á©Î»Ð¡Êý£¬²»È¡Éᣬ

public class Split{
 public static void main(String[] args){
       double pai = 3.14159;
        findTwo(pai);
  public static void findTwo(double value){
    System.out.println(new DecimalFormat("0.##"). ......

java£ºSetÑ­»·±éÀúµÄÁ©ÖÖ·½·¨Ê¹ÓÃ

package collection;
import java.util.*;
public class NewSet {
 public static void main(String[] args) {
  Set<Student> students = new HashSet<Student>();
  for (int i = 0; i < 6; i++) {
   students.add(new Student("Happy"+i,"male"+i,20+i)) ......
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