Idea debug debugging tutorial

debug debugging

idea Provide breakpoints debug Debugging method

What is a breakpoint ： A breakpoint is a location specified in the code , When the program runs to the specified position, it is interrupted , And allow developers to view the values of various variables at this time ; When the program interrupts , The line where the breakpoint is located has not been executed , So you can go through debug Set the breakpoint to find the error where the program is located ;

Add a breakpoint with the left mouse button where you want to add a breakpoint , Then right click to select debug This procedure , Get into debug Pattern , Horizontal and vertical keys , The vertical functional areas are

Re execution debug：Crtl+F5

Resume execution , Jump to the next breakpoint ：F9

Pause debug： Not usually used , So it's not common

stop it debug：Crtl+F5

Show all breakpoints ：Crtl+Shift+F5

Disable breakpoints ： This function is temporary , If you don't remove the breakpoint , Next time re execute debug Breakpoints are still valid ;

Horizontal Ribbon ：

Return to the execution breakpoint ：Alt+F10, You can jump directly from other methods to the current debug Location of program break point ,

Execute across methods ：F8, Step down , No entry method , Whether it's user-defined method or library function method ;

Enter method execution ：F7, When meeting the method , Don't keep going down , Instead, enter the method execution , But don't enter java Self contained library function method , such as println（） Method ;

Force entry method execution ：Alt+Shift+F7, Force entry method execution , Any method can enter , Whether it's a user-defined method or a library function's own method , You can enter ;

Step out ： Jump out of the way , Go back to the next line of the method ;

Jump out of the frame ： Jump out of the way , Go back to... But ;

Execute to the cursor position ： Jump to the next breakpoint , Carry on , If there is no breakpoint debug end ;

Be careful ： The horizontal ribbon also has something like a calculator , This function is to calculate the method in advance ;

At the same time, you can also right-click at the breakpoint to set the conditions for entering the breakpoint , And debugging debug Set the value of the variable in mode , The program will run according to the set variable value , however debug Then run again according to the actual variable value run;