java中this关键字用法
/**
* this关键字用法
*/
public class Flower {
int petalCount = 0;
String s = "initial value";
Flower(int petals){
petalCount = petals;
System.out.println("Constructor with one int arg");
}
Flower(String ss){
System.out.println("Constructor with one string arg");
s = ss;
}
Flower(String ss, int petals){
this(petals);
this.s = ss;
System.out.println("Constructor with string and int args");
}
Flower(){
this("hi",47);
System.out.println("Default Constructor with no args");
}
void printPetalCount(){
System.out.println("petalCount = "+petalCount+"; s = "+s);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Flower x = new Flower();
x.printPetalCount();
}
}
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2009-11-11 18:06:09
/**
*
* @author Ice*
*/
public class RarUtil{
public static void main(String args[]) throws Exception {
String compress = "D:\\test.rar";// rar压缩文件
String decompression = "D:\\";// 解压路径
unZip(compress, decompression);
}
/** ......
java exception 解决方案 - 我的异常网|异常|exception 730 - org.hibernate.LazyInitializationException:could not initialize proxy 731 - 警告: Error setting value 732 - override and commit 733 - Building workspace has encountered a problem. Errors during build 734 - Could not open the editor: An ......
先看个例子：
接口
package example;
public interface Basic {
public void hello();
}
接口的实现类
package example;
public class BasicService implements Basic {
public void hello() {
Sysyt ......
一、
先看一个程序
#include <stdio.h>
int main()
{
const int a = 5;
int b[a];
return 0;
}
在vc6.0中命名为.c文件，编译会出错，是int b[a]这一行：expected constant expression
命名为.cpp文件，没问题。
在codeblocks(一个免费开源的编译器)中编译都� ......
import java.util.*;
public class ForeachExample {
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Random r = new Random();
int[] x = new int[10];
for (int i = 0; i < x.length; i++) {
x[i] = r.nextInt(100);
}
/ ......
