Java String getChars()带示例

原文:https://www . geesforgeks . org/Java-string-getchars-examples/

java 字符串 getChars() 方法将给定的字符串中的字符复制到目标字符数组中。

语法:

public void **getChars**(int srhStartIndex, 
int srhEndIndex, char[] destArray, int destStartIndex)     
Parameters:
srhStartIndex : Index of the first character in the string to copy. 
srhEndIndex : Index after the last character in the string to copy.
destArray : Destination array where chars wil get copied.
destStartIndex : Index in the array starting from where the chars
                 will be pushed into the array.
Return: It does not return any value.

异常:StringIndexOutOfBoundsException–如果 srhStartIndex、srhEndIndex 不在适当的范围内。

示例:展示 getChars() 方法的工作

// Java program to demonstrate
// working of getChars() method

class Gfg1 {
    public static void main(String args[])
    {
        String str = "Welcome! to GeeksforGeeks";

        char[] destArray = new char[20];
        try {
            str.getChars(12, 25, destArray, 0);
            System.out.println(destArray);
        }
        catch (Exception ex) {
            System.out.println(ex);
        }
    }
}

输出:

GeeksforGeeks

// Java program to demonstrate
// exception condition in
// working of getChars() method

class Gfg2 {
    public static void main(String args[])
    {
        String str = "Welcome! to GeeksforGeeks";

        char[] destArray = new char[20];
        try {
            // Starting index 0 and ending index 24
            str.getChars(12, 26, destArray, 0);
            System.out.println(destArray);
        }
        catch (Exception ex) {
            System.out.println(ex);
        }
    }
}

输出:

java.lang.StringIndexOutOfBoundsException: String index out of range: 26

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