Java是开放源代码，如果将源代码附加到Eclipse，则始终可以使用F3来检查功能。在这种情况下，String类具有以下正在寻找的构造函数：
/**
* Allocates a new {@code String} so that it represents the sequence of
* characters currently contained in the character array argument. The
* contents of the character array are copied; subsequent modification of
* the character array does not affect the newly created string.
*
* @param value
* The initial value of the string
*/
public String(char value[]) {
int size = value.length;
this.offset = 0;
this.count = size;
this.value = Arrays.copyOf(value, size);
}
编辑：如果您想知道，Arrays.copyOf调用System.arraycopy。
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