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ListFiles.java
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‎ListFiles.java‎

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import java.io.*;
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import java.util.*;
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import java.lang.*;
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public class ListFiles
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{
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ArrayList<FileInfo> list;
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public ListFiles()
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{
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this.list = new ArrayList<FileInfo>();
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}
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public static void main(String[] args)
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{
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/*try
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{
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toList.sizeSort(args[1]);
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}
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catch(IOException e)
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{
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System.err.printf("Error: %s%n",e.getMessage());
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System.exit(1);
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}*/
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ListFiles toList = new ListFiles();
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if(args[0].equals("-size"))
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{
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if(args[1].equals("-gather"))
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{
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String[] dirs = new String[args.length-2];
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for(int i=0;i<dirs.length;i++)
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{
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dirs[i] = args[2+i];
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}
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try
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{
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toList.sizeSort(dirs);
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}
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catch(IOException e)
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{
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System.err.printf("Error: %s%n",e.getMessage());
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System.exit(1);
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}
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}
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else
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{
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String[] dirs = new String[args.length-1];
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for(int i=0;i<dirs.length;i++)
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{
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dirs[i] = args[1+i];
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}
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try
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{
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for(int i=0;i<dirs.length;i++)
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{
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toList.sizeSort(dirs[i]);
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toList.list = new ArrayList<FileInfo>();
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System.out.println("-----------------");
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}
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}
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catch(IOException e)
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{
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System.err.printf("Error: %s%n",e.getMessage());
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System.exit(1);
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}
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}
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}
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else if(args[0].equals("-gather"))
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{
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String[] dirs = new String[args.length-1];
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for(int i=0;i<dirs.length;i++)
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{
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dirs[i] = args[1+i];
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}
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System.out.println(args.length);
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try
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{
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toList.nameSort(dirs);
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}
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catch(IOException e)
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{
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System.err.printf("Error: %s%n",e.getMessage());
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System.exit(1);
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}
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}
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else
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{
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String[] dirs = new String[args.length];
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System.out.println(args.length);
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for(int i=0;i<dirs.length;i++)
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{
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dirs[i] = args[i];
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}
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try
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{
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for(int i=0;i<dirs.length;i++)
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{
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toList.nameSort(dirs[i]);
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toList.list = new ArrayList<FileInfo>();
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}
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}
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catch(IOException e)
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{
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System.err.printf("Error: %s%n",e.getMessage());
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System.exit(1);
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}
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}
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}
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public void nameSort(String dir) throws IOException
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{
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File[] fileList = listFiles(new File(dir));
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for(int i=0;i<fileList.length;i++)
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{
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if(fileList[i].isFile())
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{
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this.list.add(new FileInfo(fileList[i].getName(),fileList[i].length()));
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}
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}
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Collections.sort(this.list);
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for(int i=0;i<this.list.size();i++)
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{
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System.out.println(this.list.get(i));
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}
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}
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public void nameSort(String[] dirs) throws IOException
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{
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for(int i=0;i<dirs.length;i++)
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{
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File[] files = listFiles(new File(dirs[i]));
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for(int z=0;z<files.length;z++)
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{
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if(files[z].isFile())
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{
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this.list.add(new FileInfo(files[z].getName(),files[z].length()));
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}
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}
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}
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Collections.sort(this.list);
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for(int i=0;i<this.list.size();i++)
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{
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System.out.println(this.list.get(i));
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}
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}
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public void sizeSort(String dir) throws IOException
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{
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File[] fileList = listFiles(new File(dir));
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for(int i=0;i<fileList.length;i++)
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{
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if(fileList[i].isFile())
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{
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this.list.add(new FileInfo(fileList[i].getName(),fileList[i].length()));
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}
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}
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Collections.sort(this.list);
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for(int i=0;i<this.list.size();i++)
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{
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long max = this.list.get(i).getFileSize();
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int maxIndex = i;
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for(int j=i+1;j<this.list.size();j++)
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{
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if(this.list.get(j).getFileSize()>max)
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{
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max = this.list.get(j).getFileSize();
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maxIndex = j;
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}
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}
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long currLong = this.list.get(i).getFileSize();
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this.list.get(i).setFileSize(max);
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this.list.get(maxIndex).setFileSize(currLong);
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String currString = this.list.get(i).getFileName();
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this.list.get(i).setFileName(this.list.get(maxIndex).getFileName());
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this.list.get(maxIndex).setFileName(currString);
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}
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for(int i=0;i<this.list.size();i++)
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{
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System.out.println(this.list.get(i));
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}
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}
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public void sizeSort(String[] dirs) throws IOException
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{
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for(int i=0;i<dirs.length;i++)
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{
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File[] files = listFiles(new File(dirs[i]));
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for(int z=0;z<files.length;z++)
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{
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if(files[z].isFile())
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{
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this.list.add(new FileInfo(files[z].getName(),files[z].length()));
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}
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}
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}
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Collections.sort(this.list);
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for(int i=0;i<this.list.size();i++)
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{
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long max = this.list.get(i).getFileSize();
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int maxIndex = i;
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for(int j=i+1;j<this.list.size();j++)
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{
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if(this.list.get(j).getFileSize()>max)
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{
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max = this.list.get(j).getFileSize();
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maxIndex = j;
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}
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}
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long currLong = this.list.get(i).getFileSize();
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this.list.get(i).setFileSize(max);
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this.list.get(maxIndex).setFileSize(currLong);
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String currString = this.list.get(i).getFileName();
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this.list.get(i).setFileName(this.list.get(maxIndex).getFileName());
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this.list.get(maxIndex).setFileName(currString);
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}
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for(int i=0;i<this.list.size();i++)
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{
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System.out.println(this.list.get(i));
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}
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}
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private String[] listFileNames(File directory) throws IOException
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{
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if(!directory.exists()||!directory.isDirectory())
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{
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throw new IOException(directory + "is not a directory");
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}
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else
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{
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String[] fileNames = directory.list();
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return fileNames;
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}
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}
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private File[] listFiles(File directory) throws IOException
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{
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if(!directory.exists()||!directory.isDirectory())
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{
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throw new IOException(directory + "is not a directory");
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}
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else
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{
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File[] files = directory.listFiles();
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return files;
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}
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}
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private int[] numSort(int[] unsort)
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{
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for(int i=0;i<unsort.length;i++)
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{
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int min = unsort[i];
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int minIndex = i;
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for(int j=i;j<unsort.length;j++)
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{
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if(unsort[j]<min)
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{
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min = unsort[j];
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minIndex = j;
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}
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}
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int curr = unsort[i];
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unsort[i] = min;
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unsort[minIndex] = curr;
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}
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return unsort;
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}
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private class FileInfo implements Comparable<FileInfo>
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{
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private String fileName;
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private long fileSize;
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public FileInfo(String name, long size)
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{
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this.fileName = name;
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this.fileSize = size;
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}
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public String getFileName()
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{
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return this.fileName;
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}
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public long getFileSize()
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{
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return this.fileSize;
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}
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public void setFileName(String newName)
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{
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this.fileName = newName;
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}
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public void setFileSize(long newSize)
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{
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this.fileSize = newSize;
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}
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public String toString()
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{
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String output = String.format("%12d %s", this.fileSize, this.fileName);
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return output;
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}
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@Override
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public int compareTo(FileInfo that)
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{
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return this.getFileName().compareTo(that.getFileName());
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}
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}
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}
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