java中File类的操作

package com.javabase.sss;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.lang.reflect.Method;

import javax.security.auth.login.FailedLoginException;

public class Demofile {
	
	//获取java类的所有方法并打印出来
	public static void sgetMethod() {
		Class c = File.class;
		Method[] m =c.getMethods();
		for (int i = 0; i < m.length; i++) {
			System.out.println(m[i].getName());
		}

	}

	public static void main(String[] args) {
		File file = new File("C:/1122.txt");
		FileWriter fw = null;
		if(!file.exists()) {
			try {
				if(file.createNewFile()) {
					System.out.println("创建文件成功");
					System.out.println("文件绝对路径: " + file.getAbsolutePath());

				}
			} catch (IOException e) {
				
				e.printStackTrace();
			}
			
		}else {
			System.out.println("文件名已经存在");
		}
		
		//文件存在就写数据
		try {
			String s = "我想去南海看海! ";
			fw = new FileWriter(file,true);
			for (int i = 0; i < 100; i++) {
				fw.write(s);
			}
			
			
			fw.close();
		} catch (IOException e) {
			
			e.printStackTrace();
		}
		
		
		
	}

}