寫出String類的經常使用方法以及做用

1.用字符數組value建立一個String對象 實例:java char[] value ={"a","b","c","d"}; String str = new String(value); //至關於String str = newString("abcd") 2.用字符數組以x開始的n個字符建立一個String對象 實例:web char[] value ={"a","b","c","d"

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