[eclipse] Eclipse change project files location

I moved my default git repository folder and therefore had the same problem. I wrote my own Class to manage eclipse location and used it to change the location file.

        File locationfile 
            = new File("<workspace>"
                    +"/.metadata/.plugins/org.eclipse.core.resources/.projects/"
                    +"<project>/"
                    +".location");

        byte data[] = Files.readAllBytes(locationfile.toPath());

        EclipseLocation eclipseLocation = new EclipseLocation(data);

        eclipseLocation.changeUri("<new path to project>");

        byte newData[] = eclipseLocation.getData();

        Files.write(locationfile.toPath(),newData);

Here my EclipseLocation Class:

public class EclipseLocation {

    private byte[] data;
    private int length;
    private String uri;


    public EclipseLocation(byte[] data) {
        init(data);
    }

    public String getUri() {
        return uri;
    }

    public byte[] getData() {
        return data;
    }


    private void init(byte[] data) {

        this.data = data;   
        this.length = (data[16] * 256) + data[17];
        this.uri = new String(data,18,length);  
    }


    public void changeUri(String newUri) {

        int newLength = newUri.length();
        byte[] newdata = new byte[data.length + newLength - length];        


        int y = 0;
        int x = 0;

        //header
        while(y < 16) newdata[y++] = data[x++];

        //length
        newdata[16] = (byte) (newLength / 256);
        newdata[17] = (byte) (newLength % 256);

        y += 2;
        x += 2;

        //Uri
        for(int i = 0;i < newLength;i++)
        {
            newdata[y++] = (byte) newUri.charAt(i);
        }
        x += length;

        //footer
        while(y < newdata.length) newdata[y++] = data[x++];

        if(y != newdata.length)
            throw new IndexOutOfBoundsException();

        if(x != data.length)
            throw new IndexOutOfBoundsException();

        init(newdata);
    }


}