java£ºµÝ¹é£ºººÂÞËþÓÎÏ·¼ÆËã³ö×îÉٵIJ½Êý
package game;
public class HanTa {
public static int i = 0;
public static void main(String[] args){
calc('A', 'B', 'C', 2);
System.out.println("×îÉÙÐèÒª"+i+"²½¡£");
}
//ººÂÞËþÓÎÏ·¼ÆËã
public static void calc(char src, char ilde, char dest, int num){
if(num == 1){
i++;
System.out.println(src+"-->"+dest);
return;
}
calc(src, dest, ilde, num - 1);
i++;
System.out.println(src+"-->"+dest);
calc(ilde, src, dest, num - 1);
}
}
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±í book ÖÐÓÐname varchar2(20)//Êé¼®Ãû³Æ,buydate Date //¹ºÂòÈÕÆÚ Á½¸ö×ֶΡ£
ÒѾ´´½¨ÁËÊý¾Ý¿âÁ¬½ÓConnection conn;
·½·¨Ò»¡¢Ê¹ÓÃjava.sql.DateʵÏֱȽϼòµ¥µÄyyyy-mm-dd¸ñʽÈÕÆÚ¡£
java.sql. ......
package arrays.file;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStreamRea ......
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)) ......