在eclipse中怎样用debug调式错误

2025-03-14 23:46:42
推荐回答(3个)
回答1:

最基本的操作是:
1.首先在一个java文件中设断点,然后debug as-->open debug Dialog,然后在对话框
中选类后--> Run
当程序走到断点处就会转到debug视图下。
2.F5键与F6键均为单步调试,F5是step into,也就是进入本行代码中执行,F6是step over

也就是执行本行代码,跳到下一行,
3.F7是跳出函数
4.F8是执行到最后。
1.Step Into (also F5) 跳入
2.Step Over (also F6) 跳过
3.Step Return (also F7) 执行完当前method,然后return跳出此method
4.step Filter 逐步过滤 一直执行直到遇到未经过滤的位置或断点(设置Filter:window-
preferences-java-Debug-step Filtering)
5.resume 重新开始执行debug,一直运行直到遇到breakpoint
6.hit count 设置执行次数 适合程序中的for循环(设置 breakpoint view-右键hit count)
7.inspect 检查 运算。执行一个表达式显示执行值
8.watch 实时地监视变量的变化
9.我们常说的断点(breakpoints)是指line breakpoints,除了line breakpoints,还有其他的断点
类型:field(watchpoint)breakpoint,method breakpoint,exception breakpoint.
10.field breakpoint 也叫watchpoint(监视点) 当成员变量被读取或修改时暂挂
11.添加method breakpoint 进入/离开此方法时暂挂(Run-method breakpoint)
12.添加Exception breakpoint 捕抓到Execption时暂挂(待续...)
断点属性:
1.hit count 执行多少次数后暂挂 用于循环
2.enable condition 遇到符合你输入条件(为ture\改变时)就暂挂
3.suspend thread 多线程时暂挂此线程
4.suspend VM 暂挂虚拟机
13.variables 视图里的变量可以改变变量值,在variables 视图选择变量点击右键--change
value.一次来进行快速调试。
14.debug 过程中修改了某些code后--〉save&build-->resume-->重新暂挂于断点

回答2:

debug 调试:
1,在有可能出现错误的前面设置断点,也就是在左侧边框处双击,出现蓝色小点,这就是我们说的断点了;
2,在让程序运行的时候我们不使用run as ,而是改用debug as 模式来运行我们的程序,这样我们在程序运行到我们设置断点的地方就会停下来,这样我们按F6就可以一步一步往下走,查看变量和程序都传递了什么参数,和是否出现异常了。希望能帮到你。

回答3:

启动服务时。用debug启动就可以了。

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