How to create file in java

File Name = new File("G:/Java/lesson25_1/Name.txt");

if(Name==null){

JOptionPane.showMessageDialog(this, "Details are missing"); }

try{

    FileReader fr1 = new FileReader("Name.txt");

BufferedReader br1=new BufferedReader(fr1);

String str=br1.readLine();

br1.close();

when i do this in a method it dosn't work when i click the button