java中Random的用法
import java.util.Random;
public class MathOperators {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
//随机数的产生
int[] arr = new int[10];
Random r = new Random();
for (int m = 0; m < arr.length; m++)
{
arr[m] = r.nextInt(100);
}
for (int n = 0; n < arr.length; n++)
{
System.out.println(arr[n]);
}
}
}
相关文档：
Java学习从入门到精通
一、 JDK (Java Development Kit)
JDK是整个Java的核心，包括了Java运行环境（Java Runtime Envirnment），一堆Java工具和Java基础的类库(rt.jar)。不论什么Java应用服务器实质都是内置了某个版本的JDK。因此掌握JDK是学好Java的第一步。最主流的J ......
/************Student.java begin***************/
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
public class Student {
private String name;
private String password;
public String getName() {
return name;
}
public ......
/**
* @(#)MyTray.java
*
*
* @author Xie Xiaojin
* @version 1.00 2009/11/9
*/
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class MyTray implements ActionListener {
private MenuItem item1;
private MenuItem item2;
private MenuItem item3;
private ......
JDK1.4中
Map map = new HashMap();
Iterator it = map.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
Object key = entry.getKey();
Object value = entry.getValue();
}
JDK1.5中,应用新特性For-Each循环
Map m = new HashMap();
......
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class BubbleSort {
private static int a[] = new int[12];
private static BufferedReader in = new BufferedReader(
new InputStreamReader(System.in));
public static void bubbleSort(int a[], i ......
