Try/Catch

public class Main {

public static void main(String[] args) {
    try {
        String[] strings = {"Welcome!"};
        System.out.println(strings[1]);
    } catch (Exception e) {

//            e.printStackTrace(); System.out.println("There was an error"); } System.out.println("The application is still running!"); } }

 Throws

public class Main {

    public static void main(String[] args) {
        try {
            getArrayItem();
        } catch (ArrayIndexOutOfBoundsException e) {
            System.out.println("Array item was out of bounds");
        }
    }

    private static void getArrayItem()
    throws ArrayIndexOutOfBoundsException{
        String[] strings = {"Welcome!"};
        System.out.println(strings[1]);
    }

}

命令行调试

样例代码:

public class DebugDemo { public static void main(String[] args) { String message = args[0]; System.out.println(message); } }

编译程序:

javac DebugDemo.java -g

初始化jdb:

jdb DebugDemo "Welcome to BiHell.com" -Xdebug -Xrunjdwp:transport=st_socket,server=y,address=8000,suspendy=y

在DebugDemo类第五行暂停

stop at DebugDemo:5

输入run 开始运行程序

run

如图所示,断电在第五行 System.out.println(message);

打list 可以显示我们所有的代码:

此时我们可以打印出我们接受的变量,如:

print args[0] print message cont