List集合的过滤之lambda表达式

下面代码 是过滤List中的对象，->后面为条件，满足条件的才会放入List中

java 8 中lambda表达式写法
public static void filter(List<SQLStatement> stmtList) {
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof OracleInsertStatement) && stmt.getParent() == null).collect(Collectors.toList());
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof OracleUpdateStatement) && stmt.getParent() == null).collect(Collectors.toList());
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof OracleDeleteStatement) && stmt.getParent() == null).collect(Collectors.toList());
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof SQLSelectStatement) && stmt.getParent() == null).collect(Collectors.toList());
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof SQLUpdateStatement) && stmt.getParent() == null).collect(Collectors.toList());
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof SQLInsertStatement) && stmt.getParent() == null).collect(Collectors.toList());
    stmtList = stmtList.stream().filter(stmt -> !(stmt instanceof SQLDeleteStatement) && stmt.getParent() == null).collect(Collectors.toList());
}

 java 7 以前写法

   stmtList.stream().filter(new Predicate<SQLStatement>() {
   @Override
   public boolean test(SQLStatement stmt) {
   return !(stmt instanceof OracleInsertStatement);
   }
   }).collect(Collectors.toList());