How to execute the batch apex class using developer console?
 Example:
 Batch Apex Class:
[java]
global class accountList implements Database.Batchable<Sobject> {
 global Database.querylocator start(Database.BatchableContext BC) {
 return Database.getQueryLocator([select Id, Name from Account]);
 }
 global void execute(Database.BatchableContext BC, list<Account> scope) {
 return Database.getQueryLocator(query);
 }
 global void finish(Database.BatchableContext BC) {
 }
 }
[/java]
Execute the Batch Apex Class using Developer Console using below,
[java]
accountList objTest = new accountList();
 Database.executebatch(objTest);
[/java]