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;
}
Ïà¹ØÎĵµ£º
Ϊʲô˵ÂÒÂëÊÇÖйú³ÌÐòÔ±ÎÞ·¨±ÜÃâµÄ»°ÌâÄØ£¿Õâ¸öÊ×ÏÈÒª´Ó±àÂë»úÖÆÉÏ˵Æð£¬´ó¼Ò¶¼ÊÇÖÐÎĺÍÓ¢ÎĵıàÂë¸ñʽ²»ÊÇÒ»Ñù£¬½âÂëÒ²ÊDz»Ò»ÑùµÄ£¡Èç¹ûÖйúµÄ³ÌÐòÔ±²»»áÓöµ½ÂÒÂ룬ÄÇôֻÓÐʹÓúºÓï±à³Ì¡£ººÓï±à³ÌÊÇÔõô»ØÊÂÎÒÒ²²»´óÇå³þ£¬Ó¦¸ÃÊÇǰÄê°É£¬ÎÒÒ»ÅóÓѸøÎÒ½éÉܺºÓï±à³Ì£¬Ôõô²»´í²»´í£¿µ±Ê±ÒòΪѧϰæûȥ¹Ø×¢Õâ¸ö£¬µÈÎÒÏÐ ......
Êý¾Ý¿âÁ¬½Ó³Ø£¬ÊÇÒ»ÖÖÏ൱ʵÓõÄÓ¦ÓóÌÐò¡£Ëü¿ÉÒÔ±£´æ¡¢Î¬»¤¼°´´½¨Óû§ËùÐèµÄÊý¾Ý¿âÁ¬½Ó¡£´Ó¶øÊ¹µÃÓû§µÃµ½Ò»¸öÁ¬½ÓµÄʱ¼ä½µµÍ90%ÒÔÉÏ¡£´ó´óÌáÉýÁËÊý¾Ý¿â·ÃÎʵķ´Ó¦Ê±¼ä¡£
Õâ¸öÊÇÒ»¸ö¿ªÔ´µÄ´úÂë¡£´ó¼Ò¿ÉÒÔÐÞ¸ÄËü¡¢Ê¹ÓÃËü¡£
Ï£ÍûÎҵĴúÂëÄܶԴó¼ÒÓÐÓá£
´Ë´úÂ룬¾¹ý1000ÊýÁ¿¼¶µÄ¶àÏ̲߳¢·¢·ÃÎʲâÊÔ¡£ÔÚËĺËCPUÏÂÒ²½øÐÐ ......
Ò»£ºÒª½â¾öµÄÎÊÌâ
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£ ......
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.##"). ......
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)) ......