Solve a small question

Find a new way to debug the appliation step by step.The icon like this:
Do it like this,I can check each step error but not make breakpoint every row.The shortkey is f5. Although it's easy,but it can solve a big question.
在此之前是只知道一个在每一行的左端双击产生一个breakpoint,当点击resume:按钮时即可立即执行.现在好了.
Eclipse Debug界面上的resume按钮的右边就是这个step按钮.

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Right or wrong decide by yourself, praise or blame listen to the others, gain or loss placid as usual, success or failure return to the zero.