By Bloch J.

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It is impractical if the object is large or if it contains state that is not conducive to string representation. Under these circumstances, toString should return a summary such as "Manhattan white pages (1487536 listings)" or "Thread[main, 5,main]". Ideally, the string should be self-explanatory. ) One important decision you'll have to make when implementing a toString method is whether to specify the format of the return value in the documentation. It is recommended that you do this for value classes, such as phone numbers or matrices.

Extension; } This trick works fine here but should be used with extreme caution. MAX_VALUE (231-1). The reason this trick does not work in general is that a signed 32-bit integer is not big enough to represent the difference between two arbitrary signed 32-bit integers. If i is a large positive int and j is a large negative int, (i-j) will overflow and return a negative value. The resulting compareTo method will not work. It will return nonsensical results for some arguments, and it will violate the first and second provisions of the compareTo contract.

Be aware that if you do not at least provide a well-behaved protected clone method on a class designed for inheritance, it will be impossible for subclasses to implement Cloneable. 36 37 < BACK CONTINUE > Effective Java™: Programming Language Guide > 3. Methods Common to All Objects > Item 11: Consider implementing Comparable < BACK CONTINUE > Item 11: Consider implementing Comparable Unlike the other methods discussed in this chapter, the compareTo method is not declared in Object. Comparable interface.

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