Sharing of Eclipse code running and debugging skills: Make your program run more efficiently

As a development tool, Eclipse provides rich functions and powerful debugging functions. It can help developers run programs more efficiently during the development process. In this article, we will share several tips for running and debugging Eclipse code and provide specific code examples.

Tips 1: Conditional Breakpoint

When debugging a program, we often need to check whether a specific condition is true. At this time, we can use conditional breakpoints to help us pause the execution of the program when the conditions are met. The specific operations are as follows:

1. In the debug view of Eclipse, find the line where you want to add a conditional breakpoint.
2. Right-click the line number and select "Toggle Breakpoint"->"Breakpoint properties".
3. In the Breakpoint properties pop-up window, you can fill in a conditional expression. For example, if we want to pause the execution of the program when i equals 10, we can enter "i == 10".
4. Click the "OK" button to save the settings.

Next, when the program executes to the specified line and the conditions are met, the program will pause. We can easily view the value of the variable and perform debugging operations.

Tip 2: Breakpoint recovery

Sometimes, when we are debugging a program, we may encounter some bugs. We need to pause the execution of the program during the debugging process and restore the code to the previous state. a certain breakpoint. At this time, we can use the breakpoint recovery function to help us achieve this goal.

In Eclipse, you can use the breakpoint recovery function by following these steps:

1. In the debug view, find the breakpoint location you want to restore to.
2. Right-click the breakpoint and select "Go to"->"Restore from".
3. The program will return to the specified breakpoint location and continue execution from that location.

With the breakpoint recovery function, we can debug the program more flexibly and quickly locate the specified line of code when a problem occurs.

Tip 3: Junit unit testing

During the development process, we usually need to write some unit tests to verify the correctness of the program. Eclipse provides a built-in Junit testing framework that can help us easily write and run unit tests.

The following is a simple Junit unit test example:

import org.junit.Assert;
import org.junit.Test;

public class MyMathTest {

    @Test
    public void testAdd() {
        MyMath myMath = new MyMath();
        int result = myMath.add(3, 4);
        Assert.assertEquals(7, result);
    }
}

class MyMath {
    public int add(int a, int b) {
        return a + b;
    }
}

In Eclipse, we can run it by right-clicking on the MyMathTest class and selecting "Run As"-> "Junit Test" This unit test. Eclipse automatically runs the tests and provides feedback on the test results.

By using Junit unit testing, we can more automatically test the code and view the test results conveniently.

Summary:

This article introduces several techniques for running and debugging Eclipse code and provides specific code examples. These techniques include conditional breakpoints, breakpoint recovery, and JUnit unit testing. By using these techniques, we can develop and debug programs more efficiently.

I hope this article can be helpful to everyone and improve the efficiency and quality of program development.

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