通过输入输出流解决此问题，具体的可以查看JDK的API，实在不会的话，百度一下应该都有一堆这方面的代码。
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package com.teven.comefromnet;
/**
* Name:C.java
* Founction:
* Created:2011-9-15
* @author :teven
*/
public class CloneTest {
static class A implements Cloneable{
int i=1;
@Override
protected A clone() throws CloneNotSupportedException {
return (A)super.clone();
}
}
static class B extends A{
int j=2;
@Override
protected B clone() throws CloneNotSupportedException {
return (B)super.clone();
}
}
static class C extends B{
int k=3;
@Override
protected C clone() throws CloneNotSupportedException {
return (C)super.clone();
}
}
public static void main(String[] args) throws CloneNotSupportedException {
A a = new CloneTest.A();
A aa = (A) a.clone();
System.out.println("before clone a.i = "+ a.i+" after clone aa.i=" +aa.i);
B b = new CloneTest.B();
B bb= (B) b.clone();
System.out.println("before clone b.j = "+ b.j+" after clone bb.j=" +bb.j);
C c = new CloneTest.C();
C cc= (C) c.clone();
System.out.println("before clone c.k = "+ c.k+" after clone cc.k=" +cc.k);
}
}
程序如下：
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import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.FileNotFoundException;
public class copy {
public static void main (String args[]) {
if (args.length 2) {
System.out.println("请按以下格式输入：java copy 原路径 目标路径");
return;
}
try {
FileReader reader = new FileReader(args[0]);
FileWriter writer = new FileWriter(args[1]);
int c = -1;
while ((c = reader.read()) != -1)
writer.write(c);
reader.close();
writer.close();
} catch (FileNotFoundException fnfe) {
System.out.println("原文件不存在！");
return;
} catch (IOException ioe) {
System.out.println("拷贝失败！");
return;
}
System.out.println("拷贝成功！");
}
}
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运行程序时输入如下命令：
java copy 原文件路径 新文件路径
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截图如下：