I am not being able to make indent correctly in the file lis

I am not being able to make indent correctly in the file list in my output--

Real list--

Real output--

[Assignment1]
[src]
   LotteryResult.java
   Lottery.java
   .DS_Store
[bin]
   LotteryResult.class
   Lottery.class
   Assignment 1.iml

Desired output--

[Assignment1]

EclipseJava Projects Assignment 1 Assignment 1.iml bin Lottery.class LotteryResult.class CLASS CLASS src Lottery.java LotteryResult.java

Solution

Please find the required program along with its output. Please see the comments against each line to understand the step.

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OUTPUT:

[Projects]
[Issues]
[7.7]
[AVRM-9121]
Mail.txt
[7.5]
[AVRM-10722]
rfp_dump_oslnce_2.tar.gz
[rfp_dump_oslnce_2]
rfp_export_zxbr_OSLNCE160425certDIT.dat.csv
rfp_export_zsbr_OSLNCE160425certDIT.dat.csv
rfp_export_mxbr_OSLNCE160425certDIT.dat.csv
rfp_export_msbr_OSLNCE160425certDIT.dat.csv
rfp_dump_oslnce_1.tar.gz
[rfp_dump_oslnce_1]
rfp_export_zxbr_OSLNCE160425certDIT.dat.csv
rfp_export_zsbr_OSLNCE160425certDIT.dat.csv
rfp_export_mxbr_OSLNCE160425certDIT.dat.csv
rfp_export_msbr_OSLNCE160425certDIT.dat.csv
rfp_dump_3.tar.gz
[rfp_dump_3]
rfp_export_zxbr_BCNSXF160422certDIT.dat.csv
rfp_export_zsbr_BCNSXF160422certDIT.dat.csv
rfp_export_mxbr_BCNSXF160422certDIT.dat.csv
rfp_export_msbr_BCNSXF160422certDIT.dat.csv
rfp_dump_2.tar.gz
[rfp_dump_2]
rfp_export_zxbr_BCNSXF160421certDIT.dat.csv
rfp_export_zsbr_BCNSXF160421certDIT.dat.csv
rfp_export_mxbr_BCNSXF160421certDIT.dat.csv
rfp_export_msbr_BCNSXF160421certDIT.dat.csv
rfp_dump_1.tar.gz
[rfp_dump_1]
rfp_export_zxbr_BCNSXF160421certDIT.dat.csv
rfp_export_zsbr_BCNSXF160421certDIT.dat.csv
rfp_export_mxbr_BCNSXF160421certDIT.dat.csv
rfp_export_msbr_BCNSXF160421certDIT.dat.csv