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java£ºµÝ¹é£º10ԪǮ°´1£¬2£¬5ÔªÈÎÒâ×éºÏ

package game;
public class Money {
 public static void main(String[] args) {
  fun("", 10);
  System.out.println("×ܹ²Ëã·¨£º" + i);
 }
 // 10ԪǮµÄ×é³É£¬1£¬2£¬5ÈÎÒâ×éºÏ
 public static int i = 1;
 public static void fun(String log, int n) {
  // int num = n;
  if (0 == n) {
   System.out.println(log.substring(0, log.length() - 1) + "=");
   return;
  } else if (1 == n) {
   System.out.println(log + "1" + "=");
   return;
  }
  if (n >= 1)
   fun(log + "1+", n - 1);
  if (n >= 2)
   fun(log + "2+", n - 2);
  if (n >= 5)
   fun(log + "5+", n - 5);
  i++;
 }
}


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ÎÒÃÇÔÚ³¢ÏÊ JDK1.5 µÄʱºò£¬ÏàÐŲ»ÉÙÈËÓöµ½¹ý Unsupported major.minor version 49.0
´íÎ󣬵±Ê±¶¨»áãȻ²»ÖªËù´ë¡£ÒòΪ¸Õ¿ªÊ¼ÄÇ»á¶ù£¬ÍøÉÏÓë´ËÏà¹ØµÄÖÐÎÄ×ÊÁÏ»¹²»¶à£¬ÏÖÔÚºÃÁË£¬ÍøÉÏÒ»ÕÒ¾ÍÖªµÀÊÇÈçºÎ½â¾ö£¬´ó¶à»á¸æËßÄãҪʹÓà JDK
1.4 ÖØÐ±àÒë¡£ÄÇôÖÁÓÚΪʲô£ ......

java£ºObject¶ÔÏó½øÐÐÅÅÐò

package arrays.compara;
import java.util.Arrays;
public class Student {
 public static void main(String[] args) {
  Stu[] stus = new Stu[]{
    new Stu(156,34,"ad"),
    new Stu(153,24,"cc"),
    new Stu(126,37,"ab"), ......

java£º´óÊý¾ÝÎļþдÈ룬¶ÁÈ¡£¬·Ö¸î£¬ÅÅÐò£¬ºÏ²¢

package arrays.file;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedList;
i ......

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() { ......
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