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£ ......
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"),
......
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 ......
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() {
......