Java String getChars() 与示例

Java 字符串 getChars()方法将给定字符串中的字符复制到目标字符数组中。
句法：

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 will 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：显示getChars()方法的工作

java

// 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

// 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