import com.sun.jmx.snmp.internal.SnmpTools; //导入依赖的package包/类
/**
 * New <CODE>SnmpEngineId</CODE> with an hex string value. Can handle engine Id format &lt;host&gt:&lt;port&gt.
 * @param hexString Hexa string.
 */
SnmpEngineId(String hexString) {
    engineId = SnmpTools.ascii2binary(hexString);
    this.hexString = hexString.toLowerCase();
}
 

import com.sun.jmx.snmp.internal.SnmpTools; //导入依赖的package包/类
static void validateId(String str) throws IllegalArgumentException {
    byte[] arr = SnmpTools.ascii2binary(str);
    validateId(arr);
}