http://docs.oracle.com/javase/specs/jvms/se7/html/jvms-6.html#jvms-6.5.goto

如果有人告诉你Java中没有goto语句，那你就被骗了。事实上，Java由两层“源代码”组成。

理解goto结构是程序员用机器代码和汇编语言编程时遗留下来的，这一点很重要。因为这些语言非常基础(每条指令只做一件事)，程序控制流完全由goto语句完成(但在汇编语言中，这些被称为跳转或分支指令)。

现在，虽然C语言是相当低级的，但它可以被认为是非常高级的汇编语言——C中的每个语句和函数都可以很容易地分解成汇编语言指令。尽管C语言不是当今计算机编程的主要语言，但它仍然在低级应用程序中大量使用，例如嵌入式系统。因为C语言的函数非常接近汇编语言的函数，所以只有在C中包含goto才有意义。

It is clear that Java is an evolution of C/C++. Java shares a lot of features from C, but abstracts a lot more of the details, and therefore is simply written differently. Java is a very high-level language, so it simply is not necessary to have low-level features like goto when more high-level constructs like functions, for, for each, and while loops do the program control flow. Imagine if you were in one function and did a goto to a label into another function. What would happen when the other function returned? This idea is absurd.

这并不一定能回答为什么Java包含goto语句却不让它编译，但重要的是要知道为什么goto在较低级的应用程序中首先被使用，以及为什么在Java中使用它没有意义。

它们被保留以供将来使用(请参阅:Java语言关键字)

关键字const和goto是保留的，即使它们目前没有被使用。

Java中没有goto语句的原因可以在“Java语言环境”中找到:

Java has no goto statement. Studies illustrated that goto is (mis)used more often than not simply "because it's there". Eliminating goto led to a simplification of the language--there are no rules about the effects of a goto into the middle of a for statement, for example. Studies on approximately 100,000 lines of C code determined that roughly 90 percent of the goto statements were used purely to obtain the effect of breaking out of nested loops. As mentioned above, multi-level break and continue remove most of the need for goto statements.

因为尽管Java语言不使用它，但JVM字节码使用它。

如何在Java中使用"continue"标签的例子是:

public class Label {
    public static void main(String[] args) {
        int temp = 0;
        out: // label
        for (int i = 0; i < 3; ++i) {
            System.out.println("I am here");
            for (int j = 0; j < 20; ++j) {
                if(temp==0) {
                    System.out.println("j: " + j);
                    if (j == 1) {
                        temp = j;
                        continue out; // goto label "out"
                    }
                }
            }
        }
        System.out.println("temp = " + temp);
    }
}

结果:

I am here // i=0
j: 0
j: 1
I am here // i=1
I am here // i=2
temp = 1

请注意，您可以将goto的大多数良性用途替换为by

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