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javaloopsfilenamesprintwriter

Variable filename in Java

Is there any way you can change the name of a file each time doing a loop? Lets say I've got the following sample code: 

while(somecondition) {    
    try (PrintWriter w = new PrintWriter("output.txt", "UTF-8");){
        w.println("Bye World");
    } 
}

Now i want to change the name of output.txt each time the loop starts again to output++.txt.

I would now receive:

output1.txt
output2.txt
output3.txt
outputn.txt
Solution

  • You can use a for loop:

    for (int i = 1; i <= n && someCondition; i++) {    
    try (PrintWriter w = new PrintWriter("output" + i + ".txt", "UTF-8");){
        w.println("Bye World");
    } 
}