找到长串无需使用内置的方法在java

代码示例

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如何找到长的一串在java没有使用长度的函数

public class StringLength {
   public static void main(String args[]) throws Exception {
      String str = "sampleString";
      int i = 0;
      for(char c: str.toCharArray()) {
         i++;
      }
      System.out.println("Length of the given string ::"+i);
   }
}

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