test.java

用NETBEANS做的一个关于Java的小小的demo.大家赐教

/*
 * Test.java
 * 
 * Created on 2007-9-26, 23:12:59
 * 
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package javaapplication1;

import java.util.ArrayList;
import java.util.Collection;
import static java.lang.Math.*;

/**
 *
 * @author Administrator
 */
public class Test {
    
    public static void main(String[] args) {
        
        Collection<String> c = new ArrayList<String>();
        c.add("aaa");
        c.add("sss");
        //print(c);
        ArrayList<Integer> a = new ArrayList<Integer>();
        a.add(22);
        //int PI = 1;
        double s = PI*2;
        System.out.println(s);
    }
    
    public static void print(Collection<Object> c){
        for(Object o : c)
            System.out.println(o);
    }
 

}