How to solve the petty crimes committed by young people?

How to solve the petty crimes committed by young people? For example, street violence and stealing.( such as steal mobile phone at school)

Can you suggest some solution?

This is a wide question. Government, parents and society all have responsibilty for it .For stealing, people should have a conscious of protecting their own property. To avoid street violence, people should have a good education when they were children.