Substring java negative index9/17/2023 We will now see another example, similar to the first one but with added parameter, “endIndex”. Refer to the below attached screenshot for output.Īs you can see, we have printed the original string, as it is, at first, and then the substring. Upon executing the above code, the substring is expected to be “Java substring()”. We have specified the “beginIndex” to be from the 8 th position, meaning our new substring will start from the 8 th index, picking the character from the 8 th position of the string up to the end. Then we will print the new string with the effect of the substring method. At first, we will print the original string as it is. Declared our String data type along with its variable name and the value. We created our class, then added our main class. (sampleStr.substring(8)) Ĭode Explanation: Our first sample program has a simple demonstrated substring method with the start index parameter. String sampleStr = new String("This is Java substring()") Let us see the examples to implement substring() function in java given below: Example #1 Examples to Implement substring() Function It is important to understand the fact that every time a substring method is called, it will create a new string because the string data type is immutable. In one version, beginIndex is passed, and in another version of the substring method, beginIndex and endIndex are provided. When the beginIndex is passed, it searches for the specified index value within the string and then picks the character present at the specified index. When the substring() function in java is called, it creates a new string, which is part of the original string based on the beginIndex parameter passed and returns it. How does substring() Function work in Java? Start from the character of the specified index up to the end of the string.Įxception: In case if a negative index is passed or any index which is larger than the original length of the string, “IndexOutOfBoundsException” is thrown. Parameters it takes is a beginIndex, which specifies the index point from where to pick the substring(). This will return a fresh new string, which is a substring of the string that was passed. Syntax: public String substring(int beginIndex) Now that we have learned what a string and substring method is let’s understand the substring method’s standard syntax.
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